WO2007112814A1 - Saugmaschine - Google Patents
Saugmaschine Download PDFInfo
- Publication number
- WO2007112814A1 WO2007112814A1 PCT/EP2007/001835 EP2007001835W WO2007112814A1 WO 2007112814 A1 WO2007112814 A1 WO 2007112814A1 EP 2007001835 W EP2007001835 W EP 2007001835W WO 2007112814 A1 WO2007112814 A1 WO 2007112814A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- suction machine
- separating unit
- suction
- machine according
- rotor
- 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.)
- Ceased
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
- A61C17/06—Saliva removers; Accessories therefor
- A61C17/065—Saliva removers; Accessories therefor characterised by provisions for processing the collected matter, e.g. for separating solids or air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
- F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
- F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
- F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
- F01M2013/026—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure with pumps sucking air or blow-by gases from the crankcase
Definitions
- the present invention relates to a suction machine with a separating unit for separating liquid and optionally solid constituents from a sucked air / liquid mixture and with a suction fan which is connected to an air outlet of the separating unit.
- Such a suction machine is known from EP 0 400 431 A1.
- the suction machine described there consists of a separation unit, which is connected to a suction fan.
- the separation unit has a cyclone and a centrifuge arranged coaxially.
- Suction machines are used in dental or surgical extraction systems.
- the extracted by the dentist or surgeon from the mouth of the patient or the surgical area air / liquid mixture must first be separated in the separation unit in its liquid and optionally solid components on the one hand and the air portions on the other.
- suction machines can be integrated directly into the treatment unit, while larger, centrally positioned suction machines can be used to simultaneously supply multiple treatment stations.
- the side channel blowers used today have a relatively poor efficiency of only about 0.25-0.3 per level at best.
- their power requirement increases with the desired negative pressure.
- a suction machine for four dental treatment stations requires an electric motor with a connected load of approximately 1.5 kW.
- suction aspirators for dental or surgical suction machines today are powered by single-phase or three-phase motors which achieve a maximum efficiency of 60-70%.
- the object of the invention is therefore to provide a suction machine of the type mentioned, which has a better efficiency and which is particularly suitable for the supply of multiple treatment stations.
- the suction fan is designed as a radial fan in a suction machine of the type mentioned, the impeller is driven by an electrically commutated electric motor (EC motor).
- EC motor electrically commutated electric motor
- a radial blower has a much higher efficiency of about 0.6-0.7 per level at best.
- the power requirement of a radial blower in the partial load range is lower because radial blowers require more power the higher the volume flow. At high negative pressure but low volume flow, as is typically the case with dental or surgical suction, the power requirement is relatively low.
- the radial fan in operation is less sensitive to sucked liquid residue, foam or dust. Due to the lower mass of the impeller of a radial fan compared to a side channel blower faster startup is also guaranteed.
- the electrically commutated motor has a higher efficiency of about 80-85% compared to conventional single-phase or three-phase motors. As a result, power consumption and waste heat are lower.
- the electronics required for the operation of an electrically commutated motor permit speed control, by means of which demand-dependent suction power control can be realized without great effort.
- the separating unit and the radial fan are mechanically coupled to one another, preferably such that the separating unit runs slower than the radial fan. So can be operated with the EC motor both the radial fan and the separating unit and different speed requirements of the two subunits are taken into account.
- the coupling can be performed by a gear transmission.
- a gear transmission is also a coupling via a V-belt, a toothed belt or a friction gear into consideration.
- the one gear made of plastic and an engaging second gear made of metal so it is possible to realize a particularly quiet gear coupling and the gear is also without lubrication.
- control electronics of the EC motor is housed in a motor chamber, resulting in a particularly compact design, it is expedient to provide a fan for cooling the engine electronics.
- the fan can be advantageously arranged on the drive shaft of the separating unit.
- the air outlet of the separating unit can be easily connected via an external line with a suction nozzle of the radial fan.
- the separating unit comprises a cyclone stage and a pump or a centrifugal stage arranged coaxially.
- a good separation of the extracted air / liquid mixture is achieved.
- the suction machine can be built very compact.
- an external rotor motor enables the transmission high torques and can be operated at high speeds.
- Figure 1 is a sectional drawing of a suction machine
- FIG. 2 shows an isometric view of the suction machine from FIG. 1 in a view rotated by approximately 120 °
- FIG. 3 shows a side view of the suction machine rotated by 90 ° with respect to FIG. 1,
- Figure 4 is a plan view of the suction machine of Figure 1 and
- Figure 5 is a view of the suction machine of Figure 1 from below.
- the suction machine shown in Figures 1 to 5 has a lower housing cover 11, on the top of a cup-shaped housing segment 21 of a separating unit 20 is screwed.
- the housing segment 21 is closed by an annular intermediate flange 30 which has in the middle a suspended outlet nozzle 92 for air-freed air.
- An inlet connection 29 of the separating unit 20 leads tangentially laterally into the housing 21 (see FIG. 2) and opens in a spiral passage 35, which terminates in the interior of the housing 21.
- a y-shaped branch piece 29 ' is screwed to the example, two dental aspirator can be connected separately.
- the intermediate flange 30 is screwed to a two-chambered housing segment 31, the lower chamber of which serves as the air outlet chamber of the separating unit 20 and which laterally carries an outlet connection 37 (see FIG. 3).
- the upper chamber of the housing 31 serves to receive a gear transmission 36.
- the housing segment 31 is closed by a further housing segment 41, which serves as a motor chamber, which is attached laterally offset and whose underside is designed as a cover 47 for the upper chamber of the housing segment 31.
- the housing segment 41 is closed by a cover 51.
- the lid 51 projects radially beyond the housing segment 41 and at the same time forms the bottom for a spiral housing 61 of a radial fan 60.
- the spiral housing 61 together with the lid 51 forms a working chamber 67 for an impeller 62.
- a round air passage 65 which opens into an inlet chamber 66, which communicates with a tubular intake manifold 63.
- the working chamber 67 which otherwise has a circular cross section, has a tangential air outlet opening 68 (see FIG. 2) which extends into a spiral passage 69 which leads around the working chamber 67 to a tubular air outlet 64.
- the course of the spiral passage 69 can be seen in plan view.
- the spiral housing 61 is closed by a round upper sheet metal cover (not shown).
- Separation unit 20 via an external line, not shown here, which may be a hose or pipe, connected to the intake port 63 of the radial fan 60.
- an external line not shown here, which may be a hose or pipe, connected to the intake port 63 of the radial fan 60.
- a pump impeller 23 and a bell-shaped downwardly widening rotor 22 of a cyclone stage are arranged one above the other on a common drive shaft 34.
- a web surrounding the rotor 22 in the form of a ring helix is provided which, together with an opposing web on the inner wall of the housing 21, forms the spiral passage 35, via which the aspirated air / liquid mixture is conducted into the separating unit 20 ,
- the rotor 22 has a larger number of circumferentially distributed radial pump vanes 19 which have a narrow rectangular recess in the middle and together with a correspondingly shaped rib of the intermediate flange 30 form a dynamic seal with a return pumping action, so that no direct flow connection from the interior of the housing 21 to the central passage opening of the intermediate flange 30 consists.
- the rotor 22 In its interior, the rotor 22 has a plurality (eg, six) in the vertical and radial direction between the drive shaft 34 and the inner wall of the rotor 22 flat extending wings 25, which the interior of the rotor 22 divided into several, laterally closed sectors.
- a ring-shaped pump impeller 23 Under the rotor 22 is a ring-shaped pump impeller 23, whose outer wall extends obliquely upwards over the lower edge of the rotor 22. Inside the pump impeller 23 a plurality of radial webs 26 are arranged. At the outer edge of the pump impeller 23 are distributed over the circumference a larger number of pump blades 27, each having a narrow rectangular recess in the middle.
- the diameter of the housing segment 21 decreases in a shoulder 28, which in this way together with the bottom lid 11 delimit a liquid outlet chamber.
- a blocking web 81 projects annularly downwards and projects into the rectangular recesses of the pumping blades 27.
- the pumping blades 27 thus form a dynamic together with the shoulder 28 and the blocking web 81 protruding therefrom into the recess of the pumping blades 27 poetic.
- the pump vanes 27 extend inwardly beyond the shoulder 28 into the pump impeller 23, thus conveying liquid dripping from the rotor 22 into the pump impeller 23 and forced outwardly by the centrifugal force to a liquid outlet port 24 (see Figure 3). which extends tangentially from a lower peripheral wall of the Gepatiusegmantes 21, which lies under the shoulder 28.
- the drive shaft 34 of the separating unit 20 extends through the air outlet opening in the intermediate flange 30 and the air outlet chamber of the housing segment 31 up to the
- the gear 33 is seated on a shaft 42 which extends centrally through the housing segment 41 up to the impeller 62. Within the housing segment 41 sits on the shaft 42, a rotor 44 of an electrically commutated electric motor
- EC motor 43 which is designed as external rotor motor.
- an internal rotor rotates in an electric motor, and the outer housing is stationary. In the external rotor motor used here, this is reversed.
- the outer, permanent magnet motor housing serves as a rotor 44 and rotates, while the armature 45 (stator), which consists of several air coils, stands in the interior. This leads to a particularly compact design and enables high torques.
- an internal rotor EC motor can be used.
- the cup-shaped rotor 44 is at the bottom with the
- a bearing sleeve 53 down over, in which the shaft 42 is mounted and sitting on the outside of the armature 45 with its air coils.
- the motor control is housed on two circuit boards 46 inside the housing segment 41, of which the lower circuit board concentrically extends around the rotor 44 while the other is mounted above the armature 42 on the bearing sleeve 53.
- the motor control can also be accommodated in an external housing.
- a fan in order to cool the motor control, a fan, not shown here, can additionally be accommodated in the housing segment 41, which is preferably driven by the shaft 42.
- the motor control can be used to regulate the suction power of the suction machine relatively simply by controlling the speed according to the current demand at the treatment stations (for example 1-4 treatment places). For this purpose, the negative pressure in the suction line can be measured and the speed can be regulated accordingly.
- the motor control has a motor current limit (blocking protection).
- the impeller 62 of the radial fan 60 On the upper end of the shaft 42 sits the impeller 62 of the radial fan 60. It comprises a lower flat disc 72 and an upper frusto-conical disc 72. The disc spacing is thus reduced from the inside to the outside.
- the upper disc 71 of the impeller 62 has centrally an air inlet, which opens into the air passage 65 of the spiral housing 61.
- a vertical nozzle 74 is attached to the air inlet, which encloses a corresponding, downwardly reaching collar 75 at the air passage 65 with little play.
- Fan 62, shaft 42 and EC motor 43 are designed for very high rotational speeds in the range 12,000 to 15,000 l / min.
- the drive shaft 34 runs, and with it the rotor 20 and the pump impeller 23 of the separating unit 20 run only at relatively lower rotational speeds in FIG.
- Range from 2,800 to 4,000 l / min, as preferred for separation.
- the gear 32 may be made of plastic such as plastic.
- PTFE or PE are running
- the gear 33 is made of metal, for example made of brass or stainless steel. With this material combination, lubrication of the transmission 36 can be dispensed with.
- toothed gearing 36 it is also possible to use a planetary gearing, a V-belt or a toothed belt gearing or a friction gear for coupling the separating unit 20 and the radial fan 60.
- the high speed rotating parts of the radial fan 60 must be well balanced.
- the ball bearings, not shown here, with which the shaft 42 is mounted, must be kept small in diameter. additionally it may be necessary to have a bearing cooling system, as well as the use of high-temperature grease and a seal on the ball bearings.
- the axial operating gaps of the radial blower 60 can be relatively large in the range of approximately 1-3 mm. This simplifies assembly, as accurate spacing is not required, and renders the radial fan 60 insensitive to aspirated foam and dust.
- Housing parts such as the spiral housing 61 or the housing segment 41 can be made of plastic, which leads to lower production costs.
- the impeller 62 itself can be relatively easily, preferably made of aluminum. This allows a fast startup of the suction machine.
- the lower disc 72 of the impeller may be made of aluminum and the upper disc 71 with the blades 73 made of plastic, wherein the two discs 71, 72 are thermally riveted.
- the engine power for a suction machine designed to supply up to four treatment stations is only 0.95 kW in the exemplary embodiment.
- the pump impeller 23 is replaced by a centrifuge drum, the bottom of which has a sludge discharge opening, through which the solids content can fall when the centrifuge is discharged into a collection container.
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Mechanical Engineering (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Centrifugal Separators (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
- Separating Particles In Gases By Inertia (AREA)
Abstract
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009501886A JP2009531166A (ja) | 2006-03-28 | 2007-03-03 | 吸引機械 |
| EP07711761A EP1998709A1 (de) | 2006-03-28 | 2007-03-03 | Saugmaschine |
| CN200780011297XA CN101410072B (zh) | 2006-03-28 | 2007-03-03 | 抽吸机 |
| US12/294,291 US20090298011A1 (en) | 2006-03-28 | 2007-03-03 | Suction Machine |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006014682.4A DE102006014682B4 (de) | 2006-03-28 | 2006-03-28 | Saugmaschine |
| DE102006014682.4 | 2006-03-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2007112814A1 true WO2007112814A1 (de) | 2007-10-11 |
Family
ID=37998422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2007/001835 Ceased WO2007112814A1 (de) | 2006-03-28 | 2007-03-03 | Saugmaschine |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20090298011A1 (de) |
| EP (1) | EP1998709A1 (de) |
| JP (1) | JP2009531166A (de) |
| KR (1) | KR20090007348A (de) |
| CN (1) | CN101410072B (de) |
| DE (1) | DE102006014682B4 (de) |
| UA (1) | UA99709C2 (de) |
| WO (1) | WO2007112814A1 (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008071388A1 (de) * | 2006-12-12 | 2008-06-19 | DüRR DENTAL AG | Saugvorrichtung für dentale, medizinische und industrielle zwecke |
| JP2013501492A (ja) * | 2009-08-04 | 2013-01-10 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Hvac−送風機用の空芯コイル巻線 |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT505538B1 (de) * | 2007-07-27 | 2009-02-15 | Pregenzer Bruno | Abscheider zum abscheiden von luft und feststoffen aus einem zahnärztlichen abwassergemisch |
| DE102008045877A1 (de) | 2008-09-06 | 2010-03-11 | Bauernschmitt, Robert, Prof. | Vorrichtung zum Fixieren von Gewebe unter Unterdruck |
| DE102011014359B4 (de) * | 2011-03-17 | 2021-10-07 | Dürr Dental SE | Saugeinheit |
| FR2982715B1 (fr) * | 2011-11-14 | 2013-11-15 | Moving Magnet Tech | Module indicateur pour tableau de bord a mouvement fluide |
| DE102012101642A1 (de) * | 2012-02-29 | 2013-08-29 | DüRR DENTAL AG | Saugmaschine mit Gehäuse aus expandiertem Kunststoff |
| DE102012023747A1 (de) * | 2012-12-04 | 2014-06-05 | DüRR DENTAL AG | Medizinisches oder dentales Gebläse |
| KR101498016B1 (ko) * | 2013-09-12 | 2015-03-09 | 임경상 | 원심분리식 흡입장치 |
| DE102016004035A1 (de) * | 2015-04-13 | 2016-10-13 | Andreas Stihl Ag & Co. Kg | Sauggerät zum Sammeln von leichtem und schwerem Sammelgut |
| KR101943939B1 (ko) * | 2018-01-03 | 2019-01-30 | 김성환 | 필터 기능을 갖는 건식 석션장치 |
| AT523130B1 (de) * | 2019-11-08 | 2022-10-15 | Pregenzer Bruno | Dentalabscheider |
| CN110966238B (zh) * | 2019-12-19 | 2020-07-28 | 萧县亿达信息科技有限公司 | 一种可语音控制的风扇 |
| WO2021146130A1 (en) * | 2020-01-15 | 2021-07-22 | East West Manufacturing, Llc | Electronically commutated dc motor |
| US12132373B2 (en) | 2020-01-15 | 2024-10-29 | East West Manufacturing, Llc | Electronically commutated DC motor with encapsulating controller |
| KR102683942B1 (ko) * | 2023-11-08 | 2024-07-10 | 서문원 | 진공펌프와 기액사이클론을 이용한 일체형 석션장치 |
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| US4084946A (en) * | 1977-05-31 | 1978-04-18 | Burgess Harry L | Drilling mud degasser |
| US4753632A (en) * | 1985-11-28 | 1988-06-28 | Durr Dental Gmbh & Co Kg | Device for separating fine particles of solid matter from waste fluid |
| EP0400431A2 (de) | 1989-05-23 | 1990-12-05 | Dürr-Dental GmbH & Co. KG | Abscheideeinheit |
| US5567127A (en) * | 1994-11-09 | 1996-10-22 | Wentz; Kennith W. | Low noise air blower |
| EP0766008A1 (de) * | 1995-09-22 | 1997-04-02 | Officine Augusto CATTANI & C. S.P.A. | Trennungsvorrichtung für Fluide für zahnärztliche Ausrüstung |
| WO2002011644A1 (de) * | 2000-08-07 | 2002-02-14 | Kaltenbach & Voigt Gmbh & Co. | Vorrichtung zum abscheiden von luft aus einem abwassergemisch, insbesondere für einen medizinischen oder dentalmedizinischen behandlungsplatz |
| US20030202890A1 (en) * | 2002-04-30 | 2003-10-30 | Bundy Kenneth L. | Fan assembly |
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| US2982146A (en) * | 1958-01-30 | 1961-05-02 | Wilhelm G Stoeckicht | Gear-mechanism with a double helical gearing |
| US3078579A (en) * | 1960-10-28 | 1963-02-26 | Pelton & Crane Company | Dental aspirator with splash baffle |
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| DE2713321C2 (de) * | 1977-03-25 | 1987-02-26 | Dürr-Dental GmbH & Co KG, 7120 Bietigheim-Bissingen | Verfahren und Vorrichtung zum Abscheiden von flüssigen und festen Bestandteilen aus dem aus dem Mund eines Patienten kommenden Saugmediengemisch |
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-
2006
- 2006-03-28 DE DE102006014682.4A patent/DE102006014682B4/de not_active Expired - Fee Related
-
2007
- 2007-03-03 EP EP07711761A patent/EP1998709A1/de not_active Withdrawn
- 2007-03-03 JP JP2009501886A patent/JP2009531166A/ja active Pending
- 2007-03-03 KR KR1020087025763A patent/KR20090007348A/ko not_active Ceased
- 2007-03-03 WO PCT/EP2007/001835 patent/WO2007112814A1/de not_active Ceased
- 2007-03-03 US US12/294,291 patent/US20090298011A1/en not_active Abandoned
- 2007-03-03 UA UAA200812320A patent/UA99709C2/ru unknown
- 2007-03-03 CN CN200780011297XA patent/CN101410072B/zh not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4084946A (en) * | 1977-05-31 | 1978-04-18 | Burgess Harry L | Drilling mud degasser |
| US4753632A (en) * | 1985-11-28 | 1988-06-28 | Durr Dental Gmbh & Co Kg | Device for separating fine particles of solid matter from waste fluid |
| EP0400431A2 (de) | 1989-05-23 | 1990-12-05 | Dürr-Dental GmbH & Co. KG | Abscheideeinheit |
| US5567127A (en) * | 1994-11-09 | 1996-10-22 | Wentz; Kennith W. | Low noise air blower |
| EP0766008A1 (de) * | 1995-09-22 | 1997-04-02 | Officine Augusto CATTANI & C. S.P.A. | Trennungsvorrichtung für Fluide für zahnärztliche Ausrüstung |
| WO2002011644A1 (de) * | 2000-08-07 | 2002-02-14 | Kaltenbach & Voigt Gmbh & Co. | Vorrichtung zum abscheiden von luft aus einem abwassergemisch, insbesondere für einen medizinischen oder dentalmedizinischen behandlungsplatz |
| US20030202890A1 (en) * | 2002-04-30 | 2003-10-30 | Bundy Kenneth L. | Fan assembly |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008071388A1 (de) * | 2006-12-12 | 2008-06-19 | DüRR DENTAL AG | Saugvorrichtung für dentale, medizinische und industrielle zwecke |
| US8342822B2 (en) | 2006-12-12 | 2013-01-01 | Duerr Dental Ag | Suction device for dental, medical and industrial purposes |
| JP2013501492A (ja) * | 2009-08-04 | 2013-01-10 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Hvac−送風機用の空芯コイル巻線 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20090007348A (ko) | 2009-01-16 |
| US20090298011A1 (en) | 2009-12-03 |
| DE102006014682B4 (de) | 2017-02-02 |
| JP2009531166A (ja) | 2009-09-03 |
| CN101410072B (zh) | 2012-02-01 |
| DE102006014682A1 (de) | 2007-10-04 |
| EP1998709A1 (de) | 2008-12-10 |
| UA99709C2 (en) | 2012-09-25 |
| CN101410072A (zh) | 2009-04-15 |
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