DE69215329T2 - Optische Faserbeschichtungen und ihre Herstellung - Google Patents
Optische Faserbeschichtungen und ihre HerstellungInfo
- Publication number
- DE69215329T2 DE69215329T2 DE69215329T DE69215329T DE69215329T2 DE 69215329 T2 DE69215329 T2 DE 69215329T2 DE 69215329 T DE69215329 T DE 69215329T DE 69215329 T DE69215329 T DE 69215329T DE 69215329 T2 DE69215329 T2 DE 69215329T2
- Authority
- DE
- Germany
- Prior art keywords
- manufacture
- optical fiber
- fiber coatings
- coatings
- optical
- 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.)
- Expired - Fee Related
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/67—Unsaturated compounds having active hydrogen
- C08G18/671—Unsaturated compounds having only one group containing active hydrogen
- C08G18/672—Esters of acrylic or alkyl acrylic acid having only one group containing active hydrogen
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/104—Coating to obtain optical fibres
- C03C25/106—Single coatings
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/104—Coating to obtain optical fibres
- C03C25/1065—Multiple coatings
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/24—Coatings containing organic materials
- C03C25/26—Macromolecular compounds or prepolymers
- C03C25/32—Macromolecular compounds or prepolymers obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C03C25/326—Polyureas; Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4205—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups
- C08G18/423—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups containing cycloaliphatic groups
- C08G18/4233—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups containing cycloaliphatic groups derived from polymerised higher fatty acids or alcohols
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/81—Unsaturated isocyanates or isothiocyanates
- C08G18/8141—Unsaturated isocyanates or isothiocyanates masked
- C08G18/815—Polyisocyanates or polyisothiocyanates masked with unsaturated compounds having active hydrogen
- C08G18/8158—Polyisocyanates or polyisothiocyanates masked with unsaturated compounds having active hydrogen with unsaturated compounds having only one group containing active hydrogen
- C08G18/8175—Polyisocyanates or polyisothiocyanates masked with unsaturated compounds having active hydrogen with unsaturated compounds having only one group containing active hydrogen with esters of acrylic or alkylacrylic acid having only one group containing active hydrogen
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Medicinal Chemistry (AREA)
- Macromonomer-Based Addition Polymer (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Polyurethanes Or Polyureas (AREA)
- Paints Or Removers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB919121655A GB9121655D0 (en) | 1991-10-11 | 1991-10-11 | Optical fibre coating |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69215329D1 DE69215329D1 (de) | 1997-01-02 |
DE69215329T2 true DE69215329T2 (de) | 1997-04-03 |
Family
ID=10702804
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69215329T Expired - Fee Related DE69215329T2 (de) | 1991-10-11 | 1992-09-25 | Optische Faserbeschichtungen und ihre Herstellung |
Country Status (8)
Country | Link |
---|---|
US (1) | US5416880A (de) |
EP (1) | EP0539030B1 (de) |
JP (1) | JP3566972B2 (de) |
AU (1) | AU659495B2 (de) |
CA (1) | CA2080277A1 (de) |
DE (1) | DE69215329T2 (de) |
DK (1) | DK0539030T3 (de) |
GB (1) | GB9121655D0 (de) |
Families Citing this family (74)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
PT730615E (pt) * | 1993-11-26 | 2001-02-28 | Henkel Kgaa | Composicoes de cola praticamente inodoras compreendendo (meta)acrilatos) que contem grupos uretano |
US6013750A (en) * | 1993-11-26 | 2000-01-11 | Henkel Kommanditgesellschaft Auf Aktien | Aerobic adhesive |
AU691356B2 (en) * | 1994-11-29 | 1998-05-14 | Dsm N.V. | Radiation-curable coating composition and coating |
US6472450B2 (en) * | 1995-03-13 | 2002-10-29 | Dsm N.V. | Radiation-curable optical fiber coating composition |
GB9506861D0 (en) * | 1995-04-03 | 1995-05-24 | Zeneca Ltd | Method of coating optical fibres |
US5596669A (en) * | 1995-04-21 | 1997-01-21 | Dsm N.V. | Radiation curable coating composition and coated optical fiber |
US5859087A (en) * | 1995-10-17 | 1999-01-12 | Dsm Nv | Radiation-curable primer coating composition and a polyolefin film or molded article coated with the cured primer |
EP0952167A4 (de) * | 1996-06-17 | 2001-10-31 | Kureha Chemical Ind Co Ltd | Plastik material für linsen und verfahren zu seiner herstellung |
DE19631908A1 (de) * | 1996-08-07 | 1998-02-12 | Siemens Ag | Verfahren und Einrichtung zur Umhüllung eines elektrischen und/oder optischen Leiters mit einem Harz |
US6075065A (en) * | 1996-12-20 | 2000-06-13 | Takeda Chemical Industries, Ltd. | Photocurable resin composition and a method for producing the same |
US5777053A (en) * | 1997-01-17 | 1998-07-07 | Gencorp Inc. | In-mold coating compositions suitable as is for an end use application |
KR100460366B1 (ko) * | 1997-01-20 | 2004-12-08 | 스미토모덴키고교가부시키가이샤 | 피복된 광섬유 및 이의 제조방법 |
US5965460A (en) * | 1997-01-29 | 1999-10-12 | Mac Dermid, Incorporated | Polyurethane composition with (meth)acrylate end groups useful in the manufacture of polishing pads |
JP3860880B2 (ja) * | 1997-06-03 | 2006-12-20 | 共栄社化学株式会社 | ウレタンプレポリマー、その製造方法およびそれを成分とする感圧接着剤 |
US6022907A (en) * | 1997-06-03 | 2000-02-08 | Kyoeisha Chemical Co., Ltd. | Urethane prepolymer, process for producing the same and pressure-sensitive adhesive comprising the same |
US6023547A (en) * | 1997-06-09 | 2000-02-08 | Dsm N.V. | Radiation curable composition comprising a urethane oligomer having a polyester backbone |
US6085010A (en) * | 1997-06-11 | 2000-07-04 | Dsm N.V. | Optical glass fiber ribbon assemblies and radiation-curable compositions for use in forming ribbon assemblies |
US6391936B1 (en) | 1997-12-22 | 2002-05-21 | Dsm N.V. | Radiation-curable oligomers radiation-curable compositions, coated optical glass fibers, and ribbon assemblies |
US6018605A (en) * | 1997-12-31 | 2000-01-25 | Siecor Operations | Photoinitiator--tuned optical fiber and optical fiber ribbon and method of making the same |
US5995693A (en) * | 1998-07-02 | 1999-11-30 | Alcatel | Method of making an optical fiber ribbon with improved planarity and an optical fiber ribbon with improved planarity |
KR100629055B1 (ko) | 1999-03-19 | 2006-09-26 | 니폰 가야꾸 가부시끼가이샤 | 우레탄 올리고머, 그의 수지조성물, 그의 경화물 |
US6638616B2 (en) | 1999-10-15 | 2003-10-28 | Dsm N.V. | Radiation-curable compositions comprising oligomers having an alkyd backbone |
US6483972B1 (en) | 2000-04-06 | 2002-11-19 | Alcatel | Edge-bonded splittable optical-fiber ribbon |
WO2002055473A1 (en) | 2001-01-11 | 2002-07-18 | Dsm Ip Assets B.V. | Process for the preparation of esters of (meth)acrylic acid |
TW536640B (en) * | 2001-04-13 | 2003-06-11 | Furukawa Electric Co Ltd | Coated optical fiber |
JP2003004995A (ja) * | 2001-06-26 | 2003-01-08 | Fujikura Ltd | 分散補償光ファイバ及び分散補償光ファイバモジュール |
US6628875B2 (en) | 2001-07-20 | 2003-09-30 | Corning Incorporated | Optical fibers possessing a primary coating with a higher degree of cure and methods of making |
US7068902B2 (en) * | 2001-08-17 | 2006-06-27 | Alcatel | Radiation-curable coating composition for optical fibers comprising all-in-one oligomeric system |
US7317858B2 (en) | 2002-04-24 | 2008-01-08 | Prysmian Cavi E Sistemi Energia S.R.L. | Optical fiber with reduced attenuation loss |
EP1497380B1 (de) * | 2002-04-24 | 2014-01-15 | DSM IP Assets B.V. | Durch strahlung härtbare zusammensetzung für optische faser mit reduziertem dämfpungsverlust |
DK1650174T3 (da) | 2002-04-24 | 2012-08-20 | Prysmian Spa | Optisk fiber |
US6859600B2 (en) * | 2002-05-30 | 2005-02-22 | Alcatel | Coated optical fiber and optical fiber ribbon and method for the fabrication thereof |
AU2003253513A1 (en) * | 2002-07-18 | 2004-02-09 | Dsm Ip Assets B.V. | Coated photonic crystal fibers |
US6904210B2 (en) * | 2002-09-17 | 2005-06-07 | Fitel Usa Corp. | Fiber optic ribbon and method of buffering loss |
US7207732B2 (en) * | 2003-06-04 | 2007-04-24 | Corning Incorporated | Coated optical fiber and curable compositions suitable for coating optical fiber |
US6862392B2 (en) * | 2003-06-04 | 2005-03-01 | Corning Incorporated | Coated optical fiber and curable compositions suitable for coating optical fiber |
US7050688B2 (en) * | 2003-07-18 | 2006-05-23 | Corning Cable Systems Llc | Fiber optic articles, assemblies, and cables having optical waveguides |
AT503373A1 (de) * | 2003-08-27 | 2007-09-15 | Surface Specialties Austria | Strahlenhärtbares ungesättigtes polyesterurethanharz |
WO2006041289A1 (en) | 2004-10-15 | 2006-04-20 | Dsm Ip Assets B.V. | Radiation curable coating composition |
JP2006249264A (ja) * | 2005-03-11 | 2006-09-21 | Jsr Corp | 液状硬化性樹脂組成物 |
KR100703854B1 (ko) * | 2006-01-13 | 2007-04-09 | 에스에스씨피 주식회사 | 무용제 자외선 경화형 수성 도료 조성물 |
EP1818349A1 (de) * | 2006-02-13 | 2007-08-15 | Cytec Surface Specialties, S.A. | Strahlungshärtbare Zusammensetzungen |
JP5220279B2 (ja) * | 2006-03-23 | 2013-06-26 | 古河電気工業株式会社 | 光ファイバ素線 |
JP2008090040A (ja) * | 2006-10-03 | 2008-04-17 | Furukawa Electric Co Ltd:The | 光ファイバテープ心線 |
DE602007013605D1 (de) * | 2006-12-14 | 2011-05-12 | Dsm Ip Assets Bv | Strahlungshärtbare d 1368 cr-grundierbeschichtung für optische fasern |
US8426020B2 (en) | 2006-12-14 | 2013-04-23 | Dsm Ip Assets B.V. | D1381 supercoatings for optical fiber |
US20080226913A1 (en) * | 2006-12-14 | 2008-09-18 | Wendell Wayne Cattron | D1369 d radiation curable secondary coating for optical fiber |
CN102557484B (zh) | 2006-12-14 | 2015-02-25 | 帝斯曼知识产权资产管理有限公司 | 光纤上的d1364 bt次级涂层 |
ATE511525T1 (de) * | 2006-12-14 | 2011-06-15 | Dsm Ip Assets Bv | Strahlungshärtbare d1370 r-sekundärbeschichtung für optische fasern |
KR101105116B1 (ko) * | 2006-12-14 | 2012-01-16 | 디에스엠 아이피 어셋츠 비.브이. | 광섬유에 대한 d1365 bj 선 경화성 1차 코팅 |
US20080226911A1 (en) * | 2006-12-14 | 2008-09-18 | Xiaosong Wu | D1378 ca radiation curable primary coating for optical fiber |
US20080226915A1 (en) * | 2006-12-14 | 2008-09-18 | Xiaosong Wu | D1379 p radiation curable primary coating on optical fiber |
CN103232175B (zh) * | 2006-12-14 | 2016-05-11 | 帝斯曼知识产权资产管理有限公司 | 光纤上的d1363bt可辐射固化初级涂层 |
WO2008093776A1 (ja) * | 2007-02-02 | 2008-08-07 | Daikin Industries, Ltd. | 硬化性樹脂組成物およびその製造方法 |
EP2112183A4 (de) * | 2007-02-15 | 2010-06-02 | Daikin Ind Ltd | Härtbare harzzusammensetzung und verfahren zu ihrer herstellung |
CN101382668B (zh) * | 2007-09-04 | 2010-09-08 | 成都博深高技术材料开发有限公司 | 热敏调光材料及其制备方法和由其构成的光学器件 |
JP2010100711A (ja) * | 2008-10-22 | 2010-05-06 | Hitachi Kasei Polymer Co Ltd | ウレタン(メタ)アクリレート組成物及びシール材 |
CN102427934A (zh) | 2009-03-24 | 2012-04-25 | 陶氏环球技术有限责任公司 | 轮胎的弹性体中的天然油多元醇 |
RU2604227C2 (ru) | 2009-10-09 | 2016-12-10 | ДСМ Ай Пи ЭССЕТС Б.В. | D1452 gb отверждаемое излучением покрытие для оптического волокна |
EP2513002B1 (de) | 2009-12-17 | 2016-03-16 | DSM IP Assets B.V. | Led-aushärtung von strahlungshärtbaren glasfaserbeschichtungszusammensetzungn |
JP2012111924A (ja) * | 2009-12-28 | 2012-06-14 | Jsr Corp | 放射線硬化性樹脂組成物 |
JP5702951B2 (ja) | 2010-06-02 | 2015-04-15 | 株式会社フジクラ | 光ファイバ心線 |
WO2011155570A1 (ja) * | 2010-06-11 | 2011-12-15 | 株式会社フジクラ | 光ファイバ素線の製造方法及び製造装置 |
BR112012029161B1 (pt) | 2010-06-30 | 2019-09-24 | Dsm Ip Assets B.V. | Composição curável por radiação para fibra ótica, composição de revestimento de fibra ótica e composição curável por radiação |
KR101523421B1 (ko) | 2010-06-30 | 2015-05-27 | 디에스엠 아이피 어셋츠 비.브이. | D1492 액체 비스(아실)포스핀 옥사이드 광 개시제 및 방사선 경화성 조성물에서 이의 용도 |
JP6099999B2 (ja) * | 2013-01-30 | 2017-03-22 | 第一工業製薬株式会社 | エネルギー線硬化型樹脂組成物 |
US8923674B1 (en) * | 2013-07-02 | 2014-12-30 | Sumitomo Electric Industries, Ltd. | Optical fiber and optical cable |
GB201322933D0 (en) * | 2013-12-23 | 2014-02-12 | Croda Int Plc | A polyol |
JP6873056B2 (ja) * | 2015-06-17 | 2021-05-19 | コーニング インコーポレイテッド | 再コーティング済み光ファイバ及び光ファイバの再コーティング方法 |
JP2018077303A (ja) * | 2016-11-08 | 2018-05-17 | 住友電気工業株式会社 | 光ファイバ心線 |
KR102171805B1 (ko) * | 2017-04-21 | 2020-10-29 | (주)엘지하우시스 | 바이오 물질을 기반으로 한 uv코팅 조성물 |
JP2019045517A (ja) * | 2017-08-29 | 2019-03-22 | 住友電気工業株式会社 | 光ファイバ |
US11822117B2 (en) | 2019-10-08 | 2023-11-21 | Corning Incorporated | Primary coating compositions with improved microbending performance |
US11939418B2 (en) * | 2021-12-15 | 2024-03-26 | Stratasys, Inc. | Photo-curable compositions |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6049206B2 (ja) * | 1977-11-15 | 1985-10-31 | 大日本インキ化学工業株式会社 | 付着性の優れた重合性プレポリマ− |
US4183796A (en) * | 1978-02-09 | 1980-01-15 | Desoto, Inc. | Radiation curable oligomers based on tris(2-hydroxyethyl) isocyanurate |
JPS5829814A (ja) * | 1981-08-13 | 1983-02-22 | Dainippon Ink & Chem Inc | 重合性樹脂組成物 |
NL8303252A (nl) * | 1983-09-22 | 1985-04-16 | Philips Nv | Optische glasvezel voorzien van een eerste en een tweede bedekking. |
US4609718A (en) * | 1985-05-08 | 1986-09-02 | Desoto, Inc. | Ultraviolet curable buffer coatings for optical glass fiber based on long chain oxyalkylene diamines |
US4690502A (en) * | 1985-07-08 | 1987-09-01 | Desoto, Inc. | Ultraviolet curable optical glass fiber coatings from acrylate terminated, end-branched polyurethane polyurea oligomers |
US4690501A (en) * | 1985-07-08 | 1987-09-01 | Desoto, Inc. | Ultraviolet curable optical glass fiber coatings from acrylate terminated, end-branched polyurethane polyurea oligomers |
US4806574A (en) * | 1985-07-22 | 1989-02-21 | Desoto, Inc. | Ultraviolet curable coatings for optical glass fiber based on a polyfunctional core |
US4798852A (en) * | 1985-10-29 | 1989-01-17 | Desoto, Inc. | Ultraviolet curable coatings for optical glass fiber |
EP0241027A3 (de) * | 1986-04-11 | 1989-12-13 | Takeda Chemical Industries, Ltd. | Klebemittel |
US4973611A (en) * | 1988-04-04 | 1990-11-27 | Uvexs Incorporated | Optical fiber buffer coating with Tg |
CA1321671C (en) * | 1989-05-11 | 1993-08-24 | Paul J. Shustack | Ultraviolet radiation-curable coatings for optical fibers and optical fibers coated therewith |
US5320904A (en) * | 1991-08-12 | 1994-06-14 | Corning Incorporated | Reduction of hydrogen generation by silicone-coated optical fibers |
US5257339A (en) * | 1992-07-29 | 1993-10-26 | At&T Bell Laboratories | Package of optical fiber suitable for high speed payout |
-
1991
- 1991-10-11 GB GB919121655A patent/GB9121655D0/en active Pending
-
1992
- 1992-09-25 DE DE69215329T patent/DE69215329T2/de not_active Expired - Fee Related
- 1992-09-25 EP EP92308780A patent/EP0539030B1/de not_active Expired - Lifetime
- 1992-09-25 DK DK92308780.3T patent/DK0539030T3/da active
- 1992-10-01 AU AU26081/92A patent/AU659495B2/en not_active Ceased
- 1992-10-08 JP JP27015992A patent/JP3566972B2/ja not_active Expired - Fee Related
- 1992-10-09 CA CA002080277A patent/CA2080277A1/en not_active Abandoned
-
1994
- 1994-03-28 US US08/218,298 patent/US5416880A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
AU2608192A (en) | 1993-04-22 |
JP3566972B2 (ja) | 2004-09-15 |
GB9121655D0 (en) | 1991-11-27 |
DK0539030T3 (da) | 1997-05-05 |
EP0539030B1 (de) | 1996-11-20 |
AU659495B2 (en) | 1995-05-18 |
EP0539030A1 (de) | 1993-04-28 |
US5416880A (en) | 1995-05-16 |
CA2080277A1 (en) | 1993-04-12 |
JPH05262848A (ja) | 1993-10-12 |
DE69215329D1 (de) | 1997-01-02 |
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