BR9809399A - Processo e dispositivo para a supervisão do grau de desgaste de um parafuso de vedação que transporta um material plastificado. - Google Patents
Processo e dispositivo para a supervisão do grau de desgaste de um parafuso de vedação que transporta um material plastificado.Info
- Publication number
- BR9809399A BR9809399A BR9809399-1A BR9809399A BR9809399A BR 9809399 A BR9809399 A BR 9809399A BR 9809399 A BR9809399 A BR 9809399A BR 9809399 A BR9809399 A BR 9809399A
- Authority
- BR
- Brazil
- Prior art keywords
- wear
- degree
- sealing screw
- screw
- carries
- Prior art date
Links
- 238000000034 method Methods 0.000 title abstract 4
- 238000007789 sealing Methods 0.000 title abstract 4
- 238000012544 monitoring process Methods 0.000 title 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/74—Bypassing means, i.e. part of the molten material being diverted into downstream stages of the extruder
- B29C48/745—Bypassing means, i.e. part of the molten material being diverted into downstream stages of the extruder for plasticising or homogenising devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
- B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
- B29B7/42—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix
- B29B7/428—Parts or accessories, e.g. casings, feeding or discharging means
- B29B7/429—Screws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/58—Component parts, details or accessories; Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/58—Component parts, details or accessories; Auxiliary operations
- B29B7/72—Measuring, controlling or regulating
- B29B7/726—Measuring properties of mixture, e.g. temperature or density
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/268—Throttling of the flow, e.g. for cooperating with plasticising elements or for degassing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/69—Filters or screens for the moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92009—Measured parameter
- B29C2948/92019—Pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92323—Location or phase of measurement
- B29C2948/92361—Extrusion unit
- B29C2948/9238—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/924—Barrel or housing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92514—Pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92895—Barrel or housing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/254—Sealing means
- B29C48/2545—Sealing means for filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/69—Filters or screens for the moulding material
- B29C48/693—Substantially flat filters mounted at the end of an extruder screw perpendicular to the feed axis
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Spinning Or Twisting Of Yarns (AREA)
- Sliding-Contact Bearings (AREA)
- Control Of Conveyors (AREA)
Abstract
Patente de Invenção: <B>"PROCESSO E DISPOSITIVO PARA A SUPERVISãO DO GRAU DE DESGASTE DE UM PARAFUSO DE VEDAçãO QUE TRANSPORTA UM MATERIAL PLASTIFICADO"<D>. A invenção refere-se a um processo para o controle do grau de desgaste de um parafuso de vedação (8) de uma unidade de transporte de material plastificado, em particular plástico, que se encontra no interior de uma caixa de parafuso sem-fim (4). Para isso, a pressão do material transportado é medida em dois pontos distanciados entre si na direção do transporte. Estes dois locais encontram-se dos dois lados de um corpo de resistência (12), contra o qual o parafuso de vedação (8) transporta material. A diferença entre as duas pressões medidas é utilizada para controlar o grau de desgaste do parafuso (5) ou eventualmente da caixa respectiva. Um dispositivo adequado para executar esse processo tem uma abertura (18) na parede (29) da caixa (4) do parafuso (5), na zona do correr da rosca ou em uma zona imediatamente posterior a ela. Uma outra abertura (19) atravessa a parede da caixa (4), estando essas duas aberturas (18, 19) afastadas entre si em uma direção axial. A cada uma destas aberturas (18, 19) encontram-se ligados sensores de pressão (22, 23).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0069397A AT407855B (de) | 1997-04-23 | 1997-04-23 | Verfahren und vorrichtung zur überwachung des abnützungsgrades einer ein plastifiziertes material fördernden dichtschnecke |
PCT/AT1998/000102 WO1998047687A1 (de) | 1997-04-23 | 1998-04-20 | Verfahren und vorrichtung zur überwachung des abnützungsgrades einer ein plastifiziertes material fördernden dichtschnecke |
Publications (2)
Publication Number | Publication Date |
---|---|
BR9809399A true BR9809399A (pt) | 2000-10-24 |
BR9809399B1 BR9809399B1 (pt) | 2009-01-13 |
Family
ID=3497338
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BRPI9809399-1A BR9809399B1 (pt) | 1997-04-23 | 1998-04-20 | processo e dispositivo para a supervisço do grau de desgaste de uma rosca de vedaÇço que transporta um material plastificado. |
Country Status (15)
Country | Link |
---|---|
US (1) | US6406174B2 (pt) |
EP (1) | EP0977658B1 (pt) |
JP (1) | JP3194750B2 (pt) |
KR (1) | KR100347200B1 (pt) |
CN (1) | CN1067327C (pt) |
AT (2) | AT407855B (pt) |
AU (1) | AU717470B2 (pt) |
BR (1) | BR9809399B1 (pt) |
CA (1) | CA2283743C (pt) |
DE (1) | DE59805974D1 (pt) |
DK (1) | DK0977658T3 (pt) |
ES (1) | ES2186149T3 (pt) |
PT (1) | PT977658E (pt) |
WO (1) | WO1998047687A1 (pt) |
ZA (1) | ZA983323B (pt) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT406948B (de) * | 1999-02-09 | 2000-10-25 | Bacher Helmut | Vorrichtung zur filterung thermoplastischen kunststoffmateriales |
WO2002096619A1 (de) * | 2001-05-30 | 2002-12-05 | Röhm GmbH & Co. KG | Verfahren und vorrichtung zur druckregelung bei einem einschneckenentgasungsextruder oder einem kasdadenextruder |
DE10354273B4 (de) * | 2003-08-14 | 2005-07-07 | Battenfeld Extrusionstechnik Gmbh | Verfahren zur Verschleißerkennung bei Extrudermaschinen |
AT503014B1 (de) * | 2006-04-27 | 2007-07-15 | Schulz Helmuth | Vorrichtung zum extrudieren von thermoplastischem kunststoffgut |
AT506298B1 (de) * | 2008-02-20 | 2009-08-15 | Schulz Helmuth Ing | Vorrichtung zum extrudieren von thermoplastischem kunststoffgut |
AT510024B1 (de) | 2010-07-19 | 2012-01-15 | Engel Austria Gmbh | Plastifiziereinheit mit verschleissmesssensor |
DE102013112971B3 (de) * | 2013-11-25 | 2015-02-05 | Leistritz Extrusionstechnik Gmbh | Einrichtung und Verfahren zur Überprüfung des Aufbaus einer Extruderschnecke |
WO2015113250A1 (zh) * | 2014-01-29 | 2015-08-06 | 西门子公司 | 燃气轮机中导叶密封件磨损程度的监控方法 |
DE102017009046A1 (de) * | 2017-09-27 | 2019-03-28 | Reifenhäuser GmbH & Co. KG Maschinenfabrik | Zustandsüberwachungssystem, verfahren zum bestimmen eines abnutzungsgrads, wartungssteuerungsverfahren, betriebsführungs- und sicherheitssystem und extruder |
DE102018100455B4 (de) * | 2018-01-10 | 2020-08-20 | KraussMaffei Extrusion GmbH | Verfahren zum Betreiben einer Extrusionsanlage und Extrusionsanlage |
AT525668B1 (de) * | 2022-07-11 | 2023-06-15 | Engel Austria Gmbh | Plastifiziereinheit für eine Formgebungsmaschine |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL123360C (pt) * | 1960-11-15 | 1900-01-01 | ||
US3193877A (en) * | 1962-04-02 | 1965-07-13 | Eastman Kodak Co | Multistage extrusion screw and alternate filters |
DE1529811B2 (de) * | 1965-06-03 | 1972-06-08 | Barmag Barmer Maschinenfabrik Ag, 5600 Wuppertal | Schneckenstrangpresse fuer thermoplastische kunststoffe |
US3700247A (en) * | 1971-08-16 | 1972-10-24 | May V Latinen | Flush cooling of shaft sealing screw means |
JPS539721A (en) * | 1976-07-15 | 1978-01-28 | Shin Etsu Chem Co Ltd | Tris-triorganosilylalkylphosphites |
JPS6047797B2 (ja) * | 1978-06-07 | 1985-10-23 | ソニー株式会社 | スピ−カシステム |
CH667615A5 (de) * | 1985-05-09 | 1988-10-31 | Huemer Franz Xaver | Extrusionsanlage zur herstellung von folien aus kunststoff. |
DE3615586C1 (de) * | 1986-05-09 | 1987-05-07 | Berstorff Gmbh Masch Hermann | Strangpressvorrichtung zum Herstellen von Kunststoffschmelzemischungen |
JPS63139705A (ja) * | 1986-12-02 | 1988-06-11 | Mitsubishi Heavy Ind Ltd | スクリユ式混練・搬送装置の異常検知方法 |
DE3702348A1 (de) * | 1987-01-27 | 1988-08-04 | Pluss Stauffer Ag | Direktverarbeitung von polymer mit pulverfoermigen additiven in spritzgiessmaschinen |
DE3744193C1 (de) * | 1987-12-24 | 1989-01-26 | Berstorff Gmbh Masch Hermann | Verfahren und Extruder zum Entgasen thermoplastischer Kunststoffschmelzen ueber einen weiten Viskositaetsbereich |
DE4017724C1 (pt) * | 1990-06-01 | 1991-03-07 | Hermann Berstorff Maschinenbau Gmbh, 3000 Hannover, De | |
DE59205518D1 (de) * | 1991-08-29 | 1996-04-04 | Erema | Vorrichtung zum extrudieren von thermoplastischem kunststoffgut |
JPH05309721A (ja) * | 1992-05-06 | 1993-11-22 | Japan Steel Works Ltd:The | 押出機スクリュとシリンダの摩耗検知方法及び装置 |
JPH0647797A (ja) * | 1992-07-29 | 1994-02-22 | Sekisui Chem Co Ltd | 押出機の制御方法 |
ES2094657T3 (es) * | 1993-06-08 | 1997-01-16 | Helmut Bacher | Dispositivo para desgasificar material termoplastico. |
DE4333233C2 (de) * | 1993-09-30 | 1995-10-12 | Berstorff Gmbh Masch Hermann | Schmelzeabdichteinrichtung an Extrudern für thermoplastische Kunststoffe oder Kautschuk |
US5630968A (en) * | 1995-06-07 | 1997-05-20 | The Japan Steel Works, Ltd. | Water-injection foaming devolatilizing method |
-
1997
- 1997-04-23 AT AT0069397A patent/AT407855B/de not_active IP Right Cessation
-
1998
- 1998-04-20 JP JP54452498A patent/JP3194750B2/ja not_active Expired - Fee Related
- 1998-04-20 EP EP98916613A patent/EP0977658B1/de not_active Expired - Lifetime
- 1998-04-20 CN CN98804425A patent/CN1067327C/zh not_active Expired - Fee Related
- 1998-04-20 DK DK98916613T patent/DK0977658T3/da active
- 1998-04-20 KR KR1019997009399A patent/KR100347200B1/ko not_active IP Right Cessation
- 1998-04-20 DE DE59805974T patent/DE59805974D1/de not_active Expired - Lifetime
- 1998-04-20 BR BRPI9809399-1A patent/BR9809399B1/pt not_active IP Right Cessation
- 1998-04-20 CA CA002283743A patent/CA2283743C/en not_active Expired - Fee Related
- 1998-04-20 AT AT98916613T patent/ATE226138T1/de active
- 1998-04-20 PT PT98916613T patent/PT977658E/pt unknown
- 1998-04-20 US US09/402,140 patent/US6406174B2/en not_active Expired - Lifetime
- 1998-04-20 ES ES98916613T patent/ES2186149T3/es not_active Expired - Lifetime
- 1998-04-20 WO PCT/AT1998/000102 patent/WO1998047687A1/de active IP Right Grant
- 1998-04-20 AU AU70119/98A patent/AU717470B2/en not_active Ceased
- 1998-04-21 ZA ZA983323A patent/ZA983323B/xx unknown
Also Published As
Publication number | Publication date |
---|---|
ES2186149T3 (es) | 2003-05-01 |
DK0977658T3 (da) | 2003-02-17 |
JP2000510399A (ja) | 2000-08-15 |
ATE226138T1 (de) | 2002-11-15 |
ATA69397A (de) | 2000-11-15 |
JP3194750B2 (ja) | 2001-08-06 |
KR100347200B1 (ko) | 2002-08-03 |
AT407855B (de) | 2001-07-25 |
AU7011998A (en) | 1998-11-13 |
AU717470B2 (en) | 2000-03-30 |
KR20010006315A (ko) | 2001-01-26 |
ZA983323B (en) | 1998-11-03 |
EP0977658B1 (de) | 2002-10-16 |
PT977658E (pt) | 2003-02-28 |
CA2283743C (en) | 2004-06-22 |
CA2283743A1 (en) | 1998-10-29 |
US20010040837A1 (en) | 2001-11-15 |
US6406174B2 (en) | 2002-06-18 |
CN1067327C (zh) | 2001-06-20 |
WO1998047687A1 (de) | 1998-10-29 |
BR9809399B1 (pt) | 2009-01-13 |
CN1252749A (zh) | 2000-05-10 |
DE59805974D1 (de) | 2002-11-21 |
EP0977658A1 (de) | 2000-02-09 |
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