WO2009066331A1 - Procédé et dispositif pour déterminer le débit massique d'une coulée de matériau fondu - Google Patents

Procédé et dispositif pour déterminer le débit massique d'une coulée de matériau fondu Download PDF

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Publication number
WO2009066331A1
WO2009066331A1 PCT/IT2007/000817 IT2007000817W WO2009066331A1 WO 2009066331 A1 WO2009066331 A1 WO 2009066331A1 IT 2007000817 W IT2007000817 W IT 2007000817W WO 2009066331 A1 WO2009066331 A1 WO 2009066331A1
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WO
WIPO (PCT)
Prior art keywords
casting
perturbation
molten material
images
data processing
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Ceased
Application number
PCT/IT2007/000817
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English (en)
Inventor
Brane Sirok
Marko Hocevar
Tom Bajcar
Bogdan Blagojevic
Janez Jamnik
Giovanni Burini
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GAMMA MECCANICA SpA
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GAMMA MECCANICA SpA
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Priority to PCT/IT2007/000817 priority Critical patent/WO2009066331A1/fr
Publication of WO2009066331A1 publication Critical patent/WO2009066331A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/04—Manufacture of glass fibres or filaments by using centrifugal force, e.g. spinning through radial orifices; Construction of the spinner cups therefor
    • C03B37/05—Manufacture of glass fibres or filaments by using centrifugal force, e.g. spinning through radial orifices; Construction of the spinner cups therefor by projecting molten glass on a rotating body having no radial orifices
    • C03B37/055—Manufacture of glass fibres or filaments by using centrifugal force, e.g. spinning through radial orifices; Construction of the spinner cups therefor by projecting molten glass on a rotating body having no radial orifices by projecting onto and spinning off the outer surface of the rotating body
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
    • G01F1/203—Jet stream flowmeters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
    • G01F1/661—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters using light
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
    • G01F1/665—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters of the drag-type
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/704—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow using marked regions or existing inhomogeneities within the fluid stream, e.g. statistically occurring variations in a fluid parameter
    • G01F1/708—Measuring the time taken to traverse a fixed distance
    • G01F1/7086—Measuring the time taken to traverse a fixed distance using optical detecting arrangements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/704—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow using marked regions or existing inhomogeneities within the fluid stream, e.g. statistically occurring variations in a fluid parameter
    • G01F1/708—Measuring the time taken to traverse a fixed distance
    • G01F1/712—Measuring the time taken to traverse a fixed distance using auto-correlation or cross-correlation detection means

Definitions

  • the present invention relates to a method of determining the mass flow of a casting of molten material, in particular in the process for producing mineral wool, such as glass wool and rock wool.
  • the present invention relates to evaluation of the flow rate of a flow of molten material, such as molten rock or glass, free falling in a gravitational field.
  • melting of the material takes place in a cupola to a temperature of approximately 1500-1600 0 C.
  • the material casting once molten, comes out of the cupola through a siphon and falls freely downwards, being directed to a fibering device, adapted to reduce the molten material jet to fibre; this device consists of one or more centrifugal disks -that, by rotation, converts the casting to thin fibres settling in the settling chamber and after, by means of pendulum belts, the -fibers felt is laid on suitable conveyor belts.
  • the material is impregnated- with water-repellent substance ' s (resins and oils) and binders, so as to obtain a compact fibrous mat from which, after a , cooling and solidification process carried out in suitable furnaces, the final product is prefabricated, which product has the required fibre structure, specific weight and insulating thickness.
  • the characteristics and structure of the final product depend both on the type of mineral introduced into the cupola and on the flow ' rate of the molten material coming out of the furnace and directed to the fibering device.
  • a method proposed for evaluation of the flowing speed of the casting involves observation of the advancing motion of an air bubble within the fluid mass.
  • the air bubble is already present in the material and creates a visual reference moving with the movement of the casting of molten material.
  • this method is only applicable to transparent materials capable of making the air bubbles visible.
  • this method appeared to be not very efficient from a practical point of view, since arrival of an air bubble is not a phenomenon that can be determined with time precision, and it is also not very reliable as regards the numerical results supplied.
  • the methods currently used are based on measurements carried out on the mass of material already cooled and reduced into fibre and therefore performed in a too advanced step of the production process. This does not allow a correct and precise regulation both of the speed of the production line, and the ' material density, with suitable variations in the composition of the materials introduced upstream. A non-calibration or a wrong calibration of some factors can give rise to characteristics of the material different from the desired ones.
  • Document US 4090241 proposes a mathematical model for calculation of the mass flow, based on evaluation of the diameter of the casting at two different positions along the advancing axis of the casting, located at a known distance from each other, and on the estimate of the average viscosity of the fluid.
  • This method which is a non-invasive one, however lacks precision and is not sufficiently reliable. Accordingly, it is an aim of the present invention to propose an alternative method of determining the mass flow of a casting of molten material, that is adaptable to any type of free-falling fluid in a gravitational field.
  • a further aim of the present invention is to make available a method of determining the mass flow of a casting of molten material that can be put into practice with ease, can be repeated and gives reliable results .
  • - Fig. 1 is a diagrammatic representation of an apparatus for putting into practice the method for determination of the mass flow of a casting of molten material in accordance with the present invention
  • '- Fig. 2 shows a first image acquired from an element of the apparatus diagrammatically shown in Fig. 1, to which a first calculation method is applied;
  • FIG. 3 shows a second image acquired from an element of the apparatus diagrammatically shown in Fig. 1, to which a first calculation method is applied;
  • Fig. 4 shows the image in Fig. 2, to which a second calculation method is applied;
  • - Fig, 5 shows the image in Fig. 3, to which a second calculation method is applied;
  • - Fig. 6 shows an example of a relation function between two variables used in the calculation method described in the following specification.
  • a numerical evaluation of the mass flow of a fluid in producing mineral wool or in similar metallurgic processes has a great importance in carrying out and setting up the production process itself.
  • the method herein described aims at calculating the mass flow of a casting of molten material coming out of a cupola.
  • the operating limits for measuring the flow rate of the molten material are preferably included between 800 0 C and 1800 0 C as to temperature values, between 5 and 20 dPas (deci Pascal seconds) as to viscosity values and between 0.1 an 3 m/s as to speed values.
  • the raw materials for producing rock wool, after weighing and measuring them to the right proportions, are automatically loaded into a. cupola, in which melting of the rock takes place.
  • the molten rock is directed, through a siphon, to a fibering device 9 comprising one or more rotating discs that through centrifugation of the casting, convert- it into fibres settling in the settling chamber 10.
  • the rock wool layer that is formed is subsequently distributed by means of pendulum a collection belt 11 creating a mat that is caused to pass into a polimerization oven 12, in order to enable hardening of the binder. Afterwards the material is cut to size and packaged.
  • an apparatus for calculation of the flow rate in a molten material is denoted at 1.
  • the material rocks, minerals, glass and the like
  • the molten material comes out of cupola 2 through a siphon 3 in the form of a casting 4 falling in a gravitational free field along a preferably vertical direction substantially coincident with an advancing axis 4a.
  • Apparatus 1 further comprises perturbation means 6 for perturbing casting 4, that is adapted to cause a perturbation or disturbance remaining in the casting 4 for a given time and space interval along the advancing axis 4a of casting 4.
  • This perturbation means 6 acts at a position arbitrarily selected inside said measurement region 5.
  • the perturbation means 6 creates a disturbance in a direction transverse to the advancing axis 4a of casting 4, preferably in a perpendicular direction.
  • the disturbance generated by the perturbation means 6 can consist either of air jets causing deviation of casting 4 from the advancing axis 4a or jets of sand or small solid particles marking a given area of casting 4 in a visible manner. These jets are operated by control valves of known type and therefore not shown. Preferably, air streams generated by pneumatic systems are used.
  • apparatus 1 Opposite to the perturbation means 6 relative to axis 4a, apparatus 1 comprises video acquisition means 7 connected to and co-operating with data processing means 8.
  • the video acquisition means 7 is ⁇ such positioned as to be in the line of sight of casting 4 and of perturbation P generated by the perturbation means 6, so as to follow the perturbation motion along the casting at the inside of the measurement region 5.
  • the video acquisition means 7 comprises a videocamera for example a CMOS or a CCD camera (charge coupled device) or others which is provided with a small silicon plate that, together with the lens, is able to capture the images and convert them, due to sensors with which it is covered, into electric signals that in turn are interpreted as to position, colour, intensity, etc. and converted into bits to be sent to the processing means 8.
  • a videocamera for example a CMOS or a CCD camera (charge coupled device) or others which is provided with a small silicon plate that, together with the lens, is able to capture the images and convert them, due to sensors with which it is covered, into electric signals that in turn are interpreted as to position, colour, intensity, etc. and converted into bits to be sent to the processing means 8.
  • the videocamera is mounted in a transparent protective housing 13 inside which a slight overpressure is created relative to the external environment, to keep the lens clean and cool the videocamera 7.
  • Videocamera 7 acquires a plurality of images referring to advancing of casting 4 free falling from siphon 3 to the fibering device 9, and in particular referring to the advancing motion of perturbation P introduced by the perturbation means 6.
  • the processing means 8 comprises a computer including an image acquisition unit directly co-operating with the video acquisition .means 7 and a digital input- output unit for operation of the perturbation means 6.
  • the computer preferably comprises an analysis unit capable of analysing the plurality of acquired images and a calculation unit capable of carrying out the necessary calculations and measurements. In this way, the processing means is " able to acquire the digitised images and process them, based on a software to calculate the mass flow of the casting of molten material.
  • the proposed method is based on hypotheses that the casting 4 of molten material coming out of cupola 2 is an incompressible stationary isothermal fluid, with a uniform motion and an axially symmetric geometry. In addition, shearing stresses, surface tensions and any other effect due to drag are ignored.
  • the proposed method contemplates creation of a disturbance seen as a perturbation P of the geometry of the flow of molten material coming out of cupola 2. In other words, the disturbance generated in this case by an air flow discharged against casting 4 temporarily alters the geometric profile of the casting edges, thus obtaining a visual reference to be followed during the casting motion.
  • p is the density of the casting of molten material
  • V p is the advancing speed of the perturbation that, taking into account the preceding hypotheses, is the same as the casting advancing speed.
  • the surface of the transverse section of the casting is equal to d 2 ⁇ /4, where d is the casting diameter; in addition, in the hypotheses of uniform fluid, the propagation speed of the perturbation is equal to the ⁇ advancing speed of the casting in a -region not subjected to disturbance. Therefore, following the perturbation motion .and succeeding in determining the speed v p , the advancing speed of the casting and therefore the maximum flow rate through application of the continuity equation (1) is .obtained.
  • the software installed in the computer, by . analysing - li ⁇
  • the method herein proposed consists of two main steps: a first step during which periodic measurements of the flow rate are carried out, through evaluation of the casting diameter, of some parameters characteristic of the molten mass such as density and viscosity and the advancing speed v of the casting through measurements of the propagation speed v p of a perturbation produced; ' and a second step during which the molten material flow is no longer .perturbed but .the speed course and therefore the flow rate is calculated as a function of the spatial co-ordinate along axis 4a of the casting utilising, as the starting condition, the speed v p , obtained by calculations done during the first step.
  • This second step allows a continuous measurement of the flow rate of the molten material, without repeated and frequent perturbation actions on the casting being required.
  • the results obtained from the first step can be used as independent variables for direct use in the control of the mineral-wool production process or as boundary conditions for performing the second step. Both steps are performed with the aid of the acquisition means 7 and processing means 8. The results thus obtained are used by a control system for regulation and calibration of the whole mineral-wool production process.
  • the acquisition means 7 acquires a plurality of images for a given preestablished time interval, during which the molten material flow is perturbed by the perturbation means 6 and the thus created perturbation P moves along the advancing axis 4a of the casting.
  • the images are acquired downstream of the siphon, before the casting impinges on the fibering device 9.
  • the acquired images are sent to the processing means 8 where the acquisition unit imports them and the analysis unit compares the grey levels of a plurality of areas of these images.
  • Diagrammatically shown in Figs . 2 and 3 are two subsequent images of the casting in the measurement region 5 at perturbation P.
  • the movement of perturbation P is captured in a plurality of subsequent images, and since the videocamera is located, at a fixed position, it is possible to see that perturbation P has moved downwards, following the advancing motion of the casting.
  • the processing means 8 is able to determine deviation h of perturbation P between the first and second images.
  • this deviation h is evaluated in terms of pixels interposed between a given line of reference identified on the first image and the corresponding line, in an offset position, on the second image.
  • the time At elapsed between said two subsequent images is known, as it is fixed by the regulation parameters of the videocamera. This time interval corresponds to ⁇ the time elapsed between acquisition of each of the two images.
  • the propagation speed of the perturbation is obtained:
  • the first method that can be used is known as "correlation method” and is adapted to evaluate the vertical component of the advancing speed of the casting under any condition.
  • the analysis unit in co-operation with the calculation unit evaluates the intensity of the grey level A of each image i through the following equation:
  • E p is the grey level in the jth line of the ith image
  • N is the number of pixels in each line j.
  • Index j covers all lines in the region confined by contour "a" in Fig. 2.
  • the variable E p (i r j) has 256 grey levels included between 0 (black) and 1 (white) if a 8-bit videocamera is utilised.
  • the preceding equation (3) applies to the subsequent images, preferably to one of the subsequent images, using, as the calculation area, the region included in contour "b (h) " (Fig. 3) having the same size as the area included in contour "a".
  • the contour "b (h) " is shifted by a value h relative to contour "a” along the advancing direction of the casting.
  • Parameter h takes whole values included between 0 and H(0 ⁇ h ⁇ H), where H is the maximum admitted deviation, determined by the limits of the visual area of the videocamera, for example.
  • the cross-correlation function r (h) is ' a statistic parameter used in searching for similitudes .between images or image parts.
  • the processing means 8 reads and mutually compares several values referring to the information on the grey levels of the plurality of acquired images. A given starting reference area being fixed, . the corresponding areas of the acquired subsequent images are compared, by evaluating the intensity of the grey levels, until the image or image area having the maximum correlation with the reference image is found. Therefore, with monotonic increases of parameter h and calculation of the related cross-correlation function r (h) , it is possible to find which is the value h r/max of parameter h maximising the cross-correlation function r(h) max .
  • At is the time interval elapsed between acquisition of the two subsequent images.
  • the second method to be used for evaluating the advancing speed of perturbation v p is known as to be adapted when the disturbance profile is well defined.
  • This method contemplates identification of at least one reference region on the casting at the perturbation.
  • the region of maximum deflection of the casting from its advancing axis 4a can be found.
  • perturbation P be caused by a jet. of sand ' or admission of small solid particles, a region of different colour relative to the rest of the casting is identified.
  • the height j max ,i of a region taken as visual reference in the first image and the height jmax,i + i of the same region in the second image is measured.
  • Indexes i and 1+1 identify two subsequent images acquired in a known time interval ⁇ t .
  • the reference region, the casting edge that mostly deviate from the advancing axis 4a for example, is identified through the maximum gradient of the grey levels or through a threshold value, for example.
  • ⁇ t is the time interval elapsed between acquisition of each of the two images .
  • the casting diameter d is obtained through measurement of the distance between the side edges of the casting, in a direction transverse to axis 4a. By analysing one of the acquired images, the casting diameter in the measurement region where the speed has been calculated, is evaluated. By considering a determined height h on the image as the reference x axis, the difference is made between two co-ordinates at which the side edges of the casting are located, and this value is multiplied by the calibration coefficient k:
  • the processing means 8 calculates the position of the edges through evaluation of the grey levels.
  • density p is obtained through measurement of the temperature, the chemical composition of the casting being known, at the point where the diameter is calculated, in a manner presently known to a person skilled in the art. Each time a disturbance is generated, it is possible to obtain measurement of the flow rate.
  • the first step hitherto described is integrated with a second step contemplating calculations alone.
  • the second step contemplates return of the casting to an undisturbed condition.
  • the flow is imagined to be isothermal, stationary and free falling in a gravitational field.
  • do is the diameter calculated with equation (5) .
  • the function expressing the advancing speed of the casting as a function of the spatial co-ordinate calculated along the casting axis 4a is given by the equation:
  • Equation (8) enables the course of the casting speed along the advancing axis to be obtained, and therefore the flow rate based on equation (1) .
  • the number of the disturbance actions introduced into the casting is reduced, since the first step is only used to carry out periodic calibrations of the method.
  • Periodic measurements of the flow rate of the casting of molten material allow a precise regulation and careful calibration of the mineral-wool production process.
  • the proposed method is ininvasive, since with a limited number of perturbation actions on the casting, carried out upstream of the interaction with the fibering device, the speed profile and therefore the flow rate of the casting can be calculated.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Continuous Casting (AREA)

Abstract

L'invention porte sur un procédé de détermination du débit massique d'une coulée de matériau fondu, en particulier dans le procédé de production de laine de roche, qui comporte les étapes suivantes : la perturbation, par un moyen de perturbation (6), de la coulée (4) de matériau fondu tombant dans un champ gravitationnel le long d'un axe de progression (4a) ; l'acquisition, par un moyen d'acquisition vidéo (7), d'une propagation de la perturbation (P) le long de la coulée (4) de matériau fondu tombant librement ; le calcul de la vitesse de propagation (vp) de la perturbation le long de la coulée (4) de matériau fondu par un moyen de traitement de données (8) coopérant avec le moyen d'acquisition vidéo (7), et le calcul du débit (m) de la coulée (4) de matériau fondu en fonction de ladite vitesse de propagation (vp).
PCT/IT2007/000817 2007-11-21 2007-11-21 Procédé et dispositif pour déterminer le débit massique d'une coulée de matériau fondu Ceased WO2009066331A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IT2007/000817 WO2009066331A1 (fr) 2007-11-21 2007-11-21 Procédé et dispositif pour déterminer le débit massique d'une coulée de matériau fondu

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Application Number Priority Date Filing Date Title
PCT/IT2007/000817 WO2009066331A1 (fr) 2007-11-21 2007-11-21 Procédé et dispositif pour déterminer le débit massique d'une coulée de matériau fondu

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WO2009066331A1 true WO2009066331A1 (fr) 2009-05-28

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106706048A (zh) * 2016-12-19 2017-05-24 浙江大学 一种基于液面射流振荡的流量计装置
WO2019220748A1 (fr) * 2018-05-14 2019-11-21 花王株式会社 Dispositif et procédé d'inspection de volume de pulvérisation particulaire, et dispositif et procédé de fabrication d'un article contenant des particules
JP2024521835A (ja) * 2021-06-07 2024-06-04 サン－ゴバン イゾベール 繊維化装置の制御方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56147013A (en) * 1980-04-17 1981-11-14 Kyoto Denshi Kogyo Kk Detecting method for flow rate of liquid
US5170060A (en) * 1990-10-04 1992-12-08 Isover Saint-Gobain Measuring the flow rate of a thin stream of molten material
JP2005233679A (ja) * 2004-02-17 2005-09-02 Ishikawajima Harima Heavy Ind Co Ltd 流下ガラス流下速度計測方法および計測装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56147013A (en) * 1980-04-17 1981-11-14 Kyoto Denshi Kogyo Kk Detecting method for flow rate of liquid
US5170060A (en) * 1990-10-04 1992-12-08 Isover Saint-Gobain Measuring the flow rate of a thin stream of molten material
JP2005233679A (ja) * 2004-02-17 2005-09-02 Ishikawajima Harima Heavy Ind Co Ltd 流下ガラス流下速度計測方法および計測装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106706048A (zh) * 2016-12-19 2017-05-24 浙江大学 一种基于液面射流振荡的流量计装置
CN106706048B (zh) * 2016-12-19 2019-03-29 浙江大学 一种基于液面射流振荡的流量计装置
WO2019220748A1 (fr) * 2018-05-14 2019-11-21 花王株式会社 Dispositif et procédé d'inspection de volume de pulvérisation particulaire, et dispositif et procédé de fabrication d'un article contenant des particules
JP2019200063A (ja) * 2018-05-14 2019-11-21 花王株式会社 粉粒体散布量検査装置及び検査方法、並びに粉粒体含有物品の製造装置及び製造方法
JP2024521835A (ja) * 2021-06-07 2024-06-04 サン－ゴバン イゾベール 繊維化装置の制御方法

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