EP1419010A1 - Wälzmühle und verfahren zur vermahlung von stoffen mit magnetisierbaren bestandteilen - Google Patents
Wälzmühle und verfahren zur vermahlung von stoffen mit magnetisierbaren bestandteilenInfo
- Publication number
- EP1419010A1 EP1419010A1 EP02764781A EP02764781A EP1419010A1 EP 1419010 A1 EP1419010 A1 EP 1419010A1 EP 02764781 A EP02764781 A EP 02764781A EP 02764781 A EP02764781 A EP 02764781A EP 1419010 A1 EP1419010 A1 EP 1419010A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roller
- grinding
- electromagnetic device
- airflow
- particles
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C15/001—Air flow directing means positioned on the periphery of the horizontally rotating milling surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C15/14—Edge runners, e.g. Chile mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02B—PREPARING GRAIN FOR MILLING; REFINING GRANULAR FRUIT TO COMMERCIAL PRODUCTS BY WORKING THE SURFACE
- B02B3/00—Hulling; Husking; Decorticating; Polishing; Removing the awns; Degerming
- B02B3/04—Hulling; Husking; Decorticating; Polishing; Removing the awns; Degerming by means of rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C15/004—Shape or construction of rollers or balls
- B02C15/005—Rollers or balls of composite construction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C15/12—Mills with at least two discs or rings and interposed balls or rollers mounted like ball or roller bearings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C2015/002—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs combined with a classifier
Definitions
- the invention relates to a roller mill according to the preamble of claim 1, in particular an airflow roller mill according to the preamble of claim 4, and a method for grinding materials with magnetizable, in particular iron-containing components according to the preamble of claim 14.
- the invention is preferably suitable for slag mills and for grinding slag sand and for use in cement grinding plants in which airflow roller mills are used for grinding cement clinker, gypsum and slag sand (DE 39 21 986 Cl).
- Slag sand is produced in the iron production during the blast furnace process and contains iron particles, which lead to a relatively high wear of the components involved in the grinding process.
- the feed material is fed to a magnetic separator, in particular an over-belt magnetic separator, before comminution.
- a magnetic separator in particular an over-belt magnetic separator
- only components that are free and are not enclosed by slag are removed. These components get into the mill with the feed.
- the iron particles are broken down during the grinding process and accumulate on the grinding bowl due to their high specific weight and poor grindability. A removal takes place only if these enriched iron particles due to the centrifugal force over the grinding bowl edge and the guide vane ring into the ring channel and from here into the external circulation for the so-called "outer greetings", where they are separated from the semolina by magnetic separation devices.
- a magnetic field is to be formed by two concentric ring poles and an excitation coil.
- the grinding rollers roll on the upper ring surfaces. It is not necessary to separate magnetizable components from the grinding bed and to separate these components from the finished product from the grinding chamber. seen. The disadvantages of the presence of iron particles and similar magnetizable substances in the grinding bed and in the grinding and viewing room can therefore not be avoided.
- the invention is based on the object of creating a roller mill, in particular an airflow roller mill, and a method which, in an extremely simple and efficient manner, without interrupting the grinding operation and while maintaining the product quality, remove the iron components and further metal components from the Ensure regrind in the grinding chamber.
- a basic idea of the invention can be seen in that the magnetizable particles, in particular iron particles, present in the grinding chamber, in particular in the grinding bed on the grinding bowl and disrupted during comminution, are removed and removed by means of at least one electromagnetic device which is arranged in the grinding chamber the extraction of these particles, which can in particular take place continuously, to avoid accumulation of these particles on the grinding bed.
- the electromagnetic device is a roller-like device which rolls on the grinding bed and is designed in such a way that the magnetizable, in particular iron, particles of the grinding bed adhere to the surface.
- a discharge device which is connected to the roller-like electromagnetic device and interacts with it, the separated those magnetizable components removed from the roller-like device and discharged from the grinding chamber.
- the electromagnetic device can also be arranged above the grinding bed and with an adjustable gap between the jacket of the roller-shaped device and the grinding bowl.
- a grinding roller In roller mills, which are used, for example, as overflow mills and do not have an integrated classifier, a grinding roller can also be designed for electromagnetic separation. By removing the iron particles, which are also to be understood below as other magnetizable particles, the wear of grinding rollers and grinding bowl is reduced and the service life is increased.
- a pair of rollers consists of a grinding roller, also called a master roller, and an auxiliary roller, also called a slave roller or slave roller, which is connected upstream of the grinding roller and prepares the grinding bed, in particular, makes it more uniform and compact, and, in particular, for hard and brittle ones Fabrics, an optimized, vibration-free grinding guaranteed.
- the auxiliary roller has a non-magnetic roller shell and inside a controllable electromagnet, preferably with an iron core and electrical coils, the shape and arrangement of which are adapted to the roller shape over a predetermined area of the roller shell in order to build up an effective magnetic field.
- a controllable electromagnet preferably with an iron core and electrical coils, the shape and arrangement of which are adapted to the roller shape over a predetermined area of the roller shell in order to build up an effective magnetic field.
- the power supply for the electrical coils can expediently take place in the region of the roller axis. Furthermore, a thyristor circuit can advantageously be provided for regulating the electromagnet.
- the discharge device for removing the metal particles deposited on the electromagnetic device, in particular the iron particles is expediently designed in such a way that the separated particles can be continuously transported out of the grinding chamber and transported, for example, via the guide vane ring into a space arranged underneath.
- a discharge device which has a scraper, a conveyor trough and a downpipe is particularly advantageous.
- the wiping he can be formed like a strip and expediently extend at least over the width of the rolling surface of the electromagnetic device, for example the jacket of an auxiliary roller.
- the scraper is arranged in parallel and at an adjustable distance from the roll shell of the electromagnetically designed auxiliary roll.
- the scraper is expediently attached to the conveyor trough in a detachable and / or height-adjustable manner.
- the scraper and the conveyor trough form a unit.
- the conveyor trough with a stripper arranged in a defined manner is then advantageously fastened in such a way that a height adjustment and a change in the gap between the stripper and the electromagnetic roller is possible.
- the scraper and / or the conveyor trough can be attached to the mill housing.
- auxiliary roller with an electromagnet, for example in the region of the rocker arm or the roller axis, is advantageous.
- the scraper and / or the conveyor trough then follow the movement of the auxiliary roller and are moved up and down with it on the grinding bed.
- the conveyor trough expediently has a slope in the direction of an opening in the guide vane ring, so that the stripped particles are transported as a result of the force of gravity and, for example via a downpipe which is arranged in an opening in the guide vane ring, enter the annular channel or a space below the guide vane ring ,
- a downpipe which is arranged in an opening in the guide vane ring, enter the annular channel or a space below the guide vane ring
- an adjustable shut-off for example, a weight-loaded pendulum flap can be installed, which is swung open in the direction of the ring channel in the case of a predefinable load due to particles that have accumulated.
- the method according to the invention for grinding materials with magnetizable, in particular iron-containing components, for example slags provides that, in addition to an electromagnetic separation before the grinding process in a roller mill, in particular in an airflow roller mill, a further electromagnetic separation in the grinding chamber is carried out in order to extract the freely available particles which have been broken down in the grinding process and to prevent these particles from accumulating on the grinding bowl.
- the electromagnetic deposition in the grinding chamber is carried out with the aid of a roller-shaped device, in particular an auxiliary roller.
- the magnetizable particles in particular the iron particles
- the magnetizable particles can be extracted from the grinding bed and the grinding chamber with at least one roller-shaped electromagnetic device rolling on the grinding bed, for example an auxiliary roller which is provided with a controllable electromagnet.
- Continuous deposition on the electromagnetically designed auxiliary roller can be carried out particularly advantageously.
- the particles separated on the electromagnetically designed auxiliary roller are then advantageously stripped off with the aid of a corresponding discharge device, fed to the ring channel of the airflow roller mill via the guide vane ring and together with those via the edge of the grinding bowl centrifuged semolina entering the annular space are discharged from the mill and conveyed mechanically, in particular with a circulating bucket elevator, to the feeding device, for example to a weighing belt for the feed material.
- a further metal deposition in particular an electromagnetic deposition, is carried out.
- the grains are then usually fed back into the airflow roller mill with new feed material.
- the electromagnetic device in the auxiliary roller is controlled by a thyristor circuit and the mill is initially normal, i.e. without switching on the electromagnet, is started up and the electromagnet is only switched on after the control circuit for the auxiliary roller speed has been started up.
- the electromagnet can be controlled via the speed signal from the auxiliary rollers.
- roller mill or airflow roller mill according to the invention and the method according to the invention are that a continuous and controllable separation of the magnetizable components, in particular the iron particles, can be carried out during the grinding process and removal from the grinding chamber without interrupting the grinding operation.
- auxiliary or slave roller Due to the continuous separation and discharge from the grinding chamber and the space below the grinding bowl, there is overall less external circulation, and the system for the returned semolina, also called the reject system, can be dimensioned smaller.
- the separated and discharged iron particles are also suitable as a material for sandblasting. Another important advantage is the avoidance of wear on the grinding rollers, auxiliary rollers and on the grinding track and the associated repair costs, downtimes etc.
- FIG. 1 shows an airflow roller mill with an electromagnetically designed auxiliary roller
- Fig. 2 is a highly schematic plan view of the
- Fig. 3 shows a highly schematic cross section through an electromagnetically designed auxiliary roller with discharge device
- Fig. 4 shows a detail of an airflow roller mill with an electromagnetically designed auxiliary roller and discharge device.
- FIG. 1 shows a LOESCHE airflow roller mill 2, which is particularly predestined for cement and blastfurnace slag grinding and is provided with two pairs of rollers 3, 15.
- two grinding rollers 3 are shown in FIG. 1, but only one auxiliary roller 15. 2, however, show the two pairs of rollers, which each consist of a grinding roller (master roller) 3 and an auxiliary roller (slave roller) 15.
- the grinding rollers 3 and auxiliary rollers 15 roll on a grinding bed which is formed by the feed material on a grinding path of a rotating grinding bowl 4.
- the grinding bowl 4, which is set in rotation by a drive 8, is surrounded by a guide vane ring 6, via which a gas stream, in particular air, flows from a ring line 7 into the grinding chamber 5.
- the feed material for example blast furnace slag or a mixture of cement clinker, gypsum and slag, is fed into the airflow roller mill via metering devices, a magnetic separating device and a feed device (not shown), passes to the grinding bowl 4 and is pressed between the springs Grinding rollers 3 and the grinding bowl 4 crushed.
- the air flowing into the grinding chamber 5 via a feed channel 17 and the annular channel 7 through the guide vane ring 16 conveys the mixture of fine and coarse material into a classifying chamber 13 and into the area of a classifier 9. Coarse material is rejected and falls back on the grinding bowl 4, while fines are discharged via a fines discharge 14. 1 also shows the mill housing 12, the rocker arms 10 of the two grinding rollers 3 and a hydraulic cylinder device 11 on the left-hand grinding roller 3, which bring about the resilient pressing of the grinding rollers 3.
- the auxiliary rollers 15 in the present embodiment according to FIGS. 1 and 2 have a smaller diameter than the grinding rollers 3 and, in contrast to the grinding rollers 3, are not acted upon by force, but instead lie on the grinding bed with their own weight, with a pure rolling movement or by a targeted sliding movement superimposed rolling movement takes place.
- Each auxiliary roller 15 prepares the grinding bed for the grinding arranged behind the auxiliary roller 15, as seen in the direction of rotation of the roller bowl 5.
- roller 3 which carries out the grinding of the ground material.
- FIG. 2 shows that the auxiliary roller 15, like the grinding rollers 3, is conical and its width corresponds approximately to the width of the grinding track.
- At least one auxiliary roller 15 is designed for the electromagnetic separation of magnetizable components, in particular iron components, from the ground material to be comminuted, in order to avoid an accumulation of these components on the grinding bowl 4 and the associated wear of the grinding devices.
- the auxiliary roller 15 has a roller jacket 23 made of a non-magnetic material and is provided on the inside with an iron core 21 and electrical coils 22.
- the iron core 21 is adapted to the conically shaped roller jacket 23 of the auxiliary roller 15 and, viewed in cross section, extends approximately over two thirds of the jacket surface, so that the metal particles, in particular iron particles, to be removed are taken up by the grinding bed on the grinding bowl 4 adhering to the rotating roller jacket 23, can be transported to a discharge device 30.
- the discharge device 30 is also shown in FIG. 4.
- a stripper 31 and a conveyor trough 32 are shown in a highly schematic manner in FIG. 3.
- the electromagnetic device 20 in the interior of the auxiliary roller 15 has three electrical coils 22, which are arranged radially at an o angular distance of approximately 120 and form with the iron core 21 the stationary electromagnet by which the iron particles located on the grinding bowl are attracted and on which rotating roller jacket 23 adhering to a magnet-free area and the discharge device 30 arranged here.
- the conveyor trough 32 is arranged with a slight slope in the direction of the mill housing 12 or guide vane ring 7 and opens into a down pipe 33.
- the down pipe is arranged in an opening 35 of the guide vane ring 7 and extends as far as the annular channel 7.
- the down pipe 33 can be fastened via Fastening elements 36 take place in the area of adjacent guide vanes of the guide vane ring 6 or on the mill housing 12.
- the downpipe 33 is provided at the lower end with a closure flap 34 which is designed as a weight-loaded pendulum flap.
- the magnetized particles and in particular iron particles deposited on the auxiliary roller 15 are only held in the area of the iron core 21 and then reach the conveyor trough 32 via the stripper 31, then into the downpipe 33 and into the ring channel 7.
- the coarse material particles or semolina which were neither picked up by the grinding rollers 3 for comminution, nor reached in the air flow to the classifier 9, also collect below the grinding chamber.
- the separated iron particles are discharged from the airflow roller mill 2 (not shown) and are separated, usually on a weighing belt with a metal separator, from the semolinae, which are fed back to the airflow roller mill together with new feed material (not shown).
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
- Disintegrating Or Milling (AREA)
- Holo Graphy (AREA)
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10141414A DE10141414B4 (de) | 2001-08-23 | 2001-08-23 | Wälzmühle, Luftstrom-Wälzmühle, und Verfahren zur Vermahlung von Stoffen mit magnetisierbaren, insbesondere eisenhaltigen Bestandteilen, beispielsweise Schlacken |
| DE10141414 | 2001-08-23 | ||
| PCT/EP2002/008309 WO2003018203A1 (de) | 2001-08-23 | 2002-07-25 | Wälzmühle und verfahren zur vermahlung von stoffen mit magnetisierbaren bestandteilen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1419010A1 true EP1419010A1 (de) | 2004-05-19 |
| EP1419010B1 EP1419010B1 (de) | 2005-12-07 |
Family
ID=7696417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02764781A Expired - Lifetime EP1419010B1 (de) | 2001-08-23 | 2002-07-25 | Wälzmühle und verfahren zur vermahlung von stoffen mit magnetisierbaren bestandteilen |
Country Status (11)
| Country | Link |
|---|---|
| US (2) | US20040182955A1 (de) |
| EP (1) | EP1419010B1 (de) |
| JP (1) | JP2005500160A (de) |
| KR (1) | KR100893640B1 (de) |
| CN (1) | CN1256183C (de) |
| AT (1) | ATE311937T1 (de) |
| CA (1) | CA2446210C (de) |
| DE (2) | DE10141414B4 (de) |
| DK (1) | DK1419010T3 (de) |
| ES (1) | ES2254727T3 (de) |
| WO (1) | WO2003018203A1 (de) |
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| DK200801048A (en) * | 2008-07-30 | 2010-01-31 | Smidth As F L | Roller mill for grinding particulate material |
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| JP5645468B2 (ja) * | 2010-05-14 | 2014-12-24 | 三菱重工業株式会社 | バイオマス粉砕装置及びバイオマス・石炭混焼システム |
| CN102151606A (zh) * | 2010-12-07 | 2011-08-17 | 东北大学 | 一种贫赤铁矿高压辊磨预选方法 |
| KR20130121118A (ko) * | 2010-12-16 | 2013-11-05 | 로쉐 게엠베하 | 밀 재료를 연삭하기 위한 방법 및 롤러 밀 |
| CN102151604B (zh) * | 2010-12-27 | 2015-02-25 | 天津水泥工业设计研究院有限公司 | 立式辊磨机磨内除铁装置 |
| CN102872944B (zh) * | 2012-10-17 | 2014-08-06 | 程国铭 | 闭回路摆轮脉冲制砂机及制砂方法 |
| WO2014117031A1 (en) | 2013-01-24 | 2014-07-31 | Lp Amina Llc | Classifier |
| CN103506203A (zh) * | 2013-10-12 | 2014-01-15 | 烟台市三立工业有限公司 | 卧式磨头微粉磨粉机 |
| JP2015142876A (ja) * | 2014-01-31 | 2015-08-06 | 宇部興産株式会社 | 竪型粉砕機 |
| CN105013560A (zh) * | 2014-10-14 | 2015-11-04 | 大峘集团有限公司 | 一种具备磨内除铁功能的矿渣立磨 |
| CN104338934B (zh) * | 2014-10-17 | 2016-08-31 | 成都泰美克晶体技术有限公司 | 一种新型带吹料装置的滚磨机 |
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| CN106732970A (zh) * | 2017-03-18 | 2017-05-31 | 惠州兴鑫涂料化工有限公司 | 一种印刷油墨智能研磨机 |
| CN106902926B (zh) * | 2017-04-26 | 2019-01-22 | 郑州大学 | 一种碾碎式风选机 |
| JP6982467B2 (ja) * | 2017-10-27 | 2021-12-17 | ホソカワミクロン株式会社 | 粉体処理装置 |
| CN108187827A (zh) * | 2018-02-01 | 2018-06-22 | 先拓宏儒新材料(江苏)有限公司 | 一种去除ro相矿物的钢渣细粉磨立磨机 |
| CN109465071B (zh) * | 2019-01-16 | 2020-12-18 | 王微静 | 一种谷物磨粉机 |
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| US5975442A (en) * | 1998-09-02 | 1999-11-02 | Purser; Brian | Cable granulator |
| FR2785220B1 (fr) * | 1998-11-02 | 2001-01-12 | Soc D Const De Machines De Rec | Procede de traitement et de recyclage de pneumatiques notamment et l'installation pour la mise en oeuvre du procede |
| JP2003010710A (ja) * | 2001-07-03 | 2003-01-14 | Ishikawajima Harima Heavy Ind Co Ltd | 同時に異なる粒度の粉砕物を製造する粉砕方法及びその粉砕方法に用いるローラミル |
| JP4376566B2 (ja) * | 2003-07-16 | 2009-12-02 | カワサキプラントシステムズ株式会社 | 竪型ミルおよびその粉砕面の形状決定方法 |
-
2001
- 2001-08-23 DE DE10141414A patent/DE10141414B4/de not_active Expired - Fee Related
-
2002
- 2002-07-25 CN CNB028165144A patent/CN1256183C/zh not_active Expired - Fee Related
- 2002-07-25 EP EP02764781A patent/EP1419010B1/de not_active Expired - Lifetime
- 2002-07-25 KR KR1020047001676A patent/KR100893640B1/ko not_active Expired - Fee Related
- 2002-07-25 ES ES02764781T patent/ES2254727T3/es not_active Expired - Lifetime
- 2002-07-25 WO PCT/EP2002/008309 patent/WO2003018203A1/de not_active Ceased
- 2002-07-25 DE DE50205216T patent/DE50205216D1/de not_active Expired - Lifetime
- 2002-07-25 JP JP2003522709A patent/JP2005500160A/ja active Pending
- 2002-07-25 CA CA002446210A patent/CA2446210C/en not_active Expired - Fee Related
- 2002-07-25 AT AT02764781T patent/ATE311937T1/de not_active IP Right Cessation
- 2002-07-25 DK DK02764781T patent/DK1419010T3/da active
- 2002-07-25 US US10/483,401 patent/US20040182955A1/en not_active Abandoned
-
2005
- 2005-11-02 US US11/264,013 patent/US7350727B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO03018203A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10141414B4 (de) | 2004-03-04 |
| DE10141414A1 (de) | 2003-03-13 |
| CA2446210A1 (en) | 2003-03-06 |
| KR20040035710A (ko) | 2004-04-29 |
| KR100893640B1 (ko) | 2009-04-17 |
| DE50205216D1 (de) | 2006-01-12 |
| EP1419010B1 (de) | 2005-12-07 |
| US20040182955A1 (en) | 2004-09-23 |
| CA2446210C (en) | 2008-07-22 |
| DK1419010T3 (da) | 2006-03-27 |
| CN1256183C (zh) | 2006-05-17 |
| US7350727B2 (en) | 2008-04-01 |
| WO2003018203A1 (de) | 2003-03-06 |
| US20060049288A1 (en) | 2006-03-09 |
| ES2254727T3 (es) | 2006-06-16 |
| JP2005500160A (ja) | 2005-01-06 |
| ATE311937T1 (de) | 2005-12-15 |
| CN1547509A (zh) | 2004-11-17 |
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