FR2697016B1 - Procede de preparation et de revetement de la surface d'un composite. - Google Patents
Procede de preparation et de revetement de la surface d'un composite.Info
- Publication number
- FR2697016B1 FR2697016B1 FR8915493A FR8915493A FR2697016B1 FR 2697016 B1 FR2697016 B1 FR 2697016B1 FR 8915493 A FR8915493 A FR 8915493A FR 8915493 A FR8915493 A FR 8915493A FR 2697016 B1 FR2697016 B1 FR 2697016B1
- Authority
- FR
- France
- Prior art keywords
- composite
- preparing
- coating
- 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
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5093—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with elements other than metals or carbon
- C04B41/5096—Silicon
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/87—Ceramics
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/02—Pretreatment of the material to be coated
- C23C16/0254—Physical treatment to alter the texture of the surface, e.g. scratching or polishing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
- Y10T428/24521—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness with component conforming to contour of nonplanar surface
- Y10T428/24537—Parallel ribs and/or grooves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
- Y10T428/24612—Composite web or sheet
- Y10T428/2462—Composite web or sheet with partial filling of valleys on outer surface
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Laminated Bodies (AREA)
- Chemical Vapour Deposition (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/277,141 US5435889A (en) | 1988-11-29 | 1988-11-29 | Preparation and coating of composite surfaces |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2697016A1 FR2697016A1 (fr) | 1994-04-22 |
FR2697016B1 true FR2697016B1 (fr) | 1995-10-20 |
Family
ID=23059562
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8915493A Expired - Fee Related FR2697016B1 (fr) | 1988-11-29 | 1989-11-24 | Procede de preparation et de revetement de la surface d'un composite. |
Country Status (4)
Country | Link |
---|---|
US (1) | US5435889A (fr) |
JP (1) | JP3090457B2 (fr) |
FR (1) | FR2697016B1 (fr) |
GB (1) | GB2273718B (fr) |
Families Citing this family (63)
Publication number | Priority date | Publication date | Assignee | Title |
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US5419971A (en) | 1993-03-03 | 1995-05-30 | General Electric Company | Enhanced thermal barrier coating system |
JPH07161455A (ja) * | 1993-12-09 | 1995-06-23 | Sumitomo Electric Ind Ltd | ダイヤモンドヒ−タ |
NO950173L (no) * | 1994-01-27 | 1995-07-28 | Praxair Technology Inc | Slagresistent oksydasjonsbeskyttelse for grafittdeler |
US5558789A (en) * | 1994-03-02 | 1996-09-24 | University Of Florida | Method of applying a laser beam creating micro-scale surface structures prior to deposition of film for increased adhesion |
JPH07286894A (ja) * | 1994-04-18 | 1995-10-31 | Fujitsu Ltd | 赤外線検知装置の製造方法 |
JP3606472B2 (ja) * | 1994-07-12 | 2005-01-05 | 信越化学工業株式会社 | 熱分解窒化ホウ素被覆複層成形体及びその製造方法 |
DE4443074C1 (de) * | 1994-12-03 | 1995-12-14 | Winter & Sohn Ernst | Verfahren zur Herstellung von abrasiv belegten Einkegelscheiben, insbesondere Abrichtscheiben |
IN187505B (fr) * | 1995-03-10 | 2002-05-11 | Gen Electric | |
FR2736850B1 (fr) * | 1995-07-19 | 1997-10-10 | Peugeot | Moule de fonderie et procede de realisation d'un tel moule |
AU695440B2 (en) * | 1995-08-16 | 1998-08-13 | Northrop Grumman Corporation | Reducing wear between structural fiber reinforced ceramic matrix composite automotive engine parts in sliding contacting relationship |
US5776355A (en) * | 1996-01-11 | 1998-07-07 | Saint-Gobain/Norton Industrial Ceramics Corp | Method of preparing cutting tool substrate materials for deposition of a more adherent diamond coating and products resulting therefrom |
US5830545A (en) * | 1996-04-29 | 1998-11-03 | Tetra Laval Holdings & Finance, S.A. | Multilayer, high barrier laminate |
US6235379B1 (en) * | 1996-08-20 | 2001-05-22 | Kabushiki Kaisha Toshiba | Ceramic matrix composite and method of manufacturing the same |
US5875549A (en) * | 1997-03-17 | 1999-03-02 | Siemens Westinghouse Power Corporation | Method of forming internal passages within articles and articles formed by same |
US6141870A (en) * | 1997-08-04 | 2000-11-07 | Peter K. Trzyna | Method for making electrical device |
EP0899053A3 (fr) | 1997-08-29 | 2000-04-05 | Sintokogio Ltd. | Produit plaqué et procédé et dispositif pour sa fabrication |
JPH11236286A (ja) * | 1997-12-15 | 1999-08-31 | Ngk Insulators Ltd | 炭化硼素皮膜の製造方法 |
SG126668A1 (en) | 1998-12-29 | 2006-11-29 | Bfr Holding Ltd | Protective boot and sole structure |
US6333092B1 (en) | 1999-02-25 | 2001-12-25 | The United States Of America As Represented By The Secretary Of The Navy | Fractal interfacial enhancement of composite delamination resistance |
US6136370A (en) * | 1999-07-16 | 2000-10-24 | Morton International, Inc. | Method of powder coating a substrate |
US6471881B1 (en) | 1999-11-23 | 2002-10-29 | United Technologies Corporation | Thermal barrier coating having improved durability and method of providing the coating |
US6344246B1 (en) * | 2000-05-10 | 2002-02-05 | The United States Of America As Represented By The Secretary Of The Navy | Laser irradiation induced non-skid surface layer formation on substrate |
MXPA02011494A (es) | 2001-12-04 | 2003-06-30 | Rohm & Haas | Metodo para reducir defectos de superficie en una superficie revestida con polvo. |
US7094450B2 (en) * | 2003-04-30 | 2006-08-22 | General Electric Company | Method for applying or repairing thermal barrier coatings |
US20050064146A1 (en) * | 2003-09-19 | 2005-03-24 | Kendall Hollis | Spray shadowing for stress relief and mechanical locking in thick protective coatings |
US7722246B1 (en) * | 2005-04-20 | 2010-05-25 | Carty William M | Method for determining the thermal expansion coefficient of ceramic bodies and glazes |
EP1767320A1 (fr) * | 2005-09-27 | 2007-03-28 | Fimag di Mario Finocchiaro | Dispositif pour la fabrication de carreaux à motifs et les carreaux obtenus ainsi |
EP1996341B1 (fr) | 2006-02-20 | 2018-09-26 | Kang N. Lee | Article comprenant un systeme de revetement formant une barriere environnementale |
GB0612399D0 (en) * | 2006-06-23 | 2006-08-02 | Johnson Matthey Plc | Improvements in coated materials |
US7559137B2 (en) * | 2006-07-17 | 2009-07-14 | Potomac Photonics, Inc. | Method for providing electrically conductive paths in polymer tubing |
US7685922B1 (en) * | 2007-10-05 | 2010-03-30 | The United States Of America As Represented By The Secretary Of The Navy | Composite ballistic armor having geometric ceramic elements for shock wave attenuation |
FR2932106B1 (fr) * | 2008-06-06 | 2010-05-21 | Airbus France | Procede de depose d'un revetement visant a ameliorer l'ecoulement laminaire |
US20100047526A1 (en) * | 2008-08-19 | 2010-02-25 | Merrill Gary B | Subsurface inclusions of spheroids and methodology for strengthening a surface bond in a hybrid ceramic matrix composite structure |
US20100047512A1 (en) * | 2008-08-19 | 2010-02-25 | Morrison Jay A | Methodology and tooling arrangements for strengthening a surface bond in a hybrid ceramic matrix composite structure |
US7704596B2 (en) | 2008-09-23 | 2010-04-27 | Siemens Energy, Inc. | Subsurface inclusion of fugitive objects and methodology for strengthening a surface bond in a hybrid ceramic matrix composite structure |
US20100080953A1 (en) * | 2008-09-26 | 2010-04-01 | Siemens Power Generation, Inc. | Formation of Imprints and Methodology for Strengthening a Surface Bond in a Hybrid Ceramic Matrix Composite Structure |
WO2010039699A2 (fr) | 2008-09-30 | 2010-04-08 | Rolls-Royce Corporation | Revêtement incluant une couche à base de silicate de terre rare comprenant une seconde phase |
US9194243B2 (en) * | 2009-07-17 | 2015-11-24 | Rolls-Royce Corporation | Substrate features for mitigating stress |
DE102009037183B4 (de) | 2009-08-12 | 2012-03-22 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zur Herstellung eines Formteils, insbesondere eines Bedienteils für den Fahrgastraum eines Kraftfahrzeugs |
JP5767248B2 (ja) | 2010-01-11 | 2015-08-19 | ロールス−ロイス コーポレイション | 環境障壁コーティングに加わる熱又は機械的応力を軽減するための特徴体 |
US9428650B2 (en) * | 2012-12-11 | 2016-08-30 | General Electric Company | Environmental barrier coatings and methods therefor |
WO2014164859A2 (fr) * | 2013-03-11 | 2014-10-09 | Rolls-Royce Corporation | Couche déformable pour composants céramiques et ses procédés de fabrication |
US10040094B2 (en) | 2013-03-15 | 2018-08-07 | Rolls-Royce Corporation | Coating interface |
US8939706B1 (en) | 2014-02-25 | 2015-01-27 | Siemens Energy, Inc. | Turbine abradable layer with progressive wear zone having a frangible or pixelated nib surface |
WO2015130521A2 (fr) | 2014-02-25 | 2015-09-03 | Siemens Aktiengesellschaft | Trou de refroidissement de pièce de turbine à l'intérieur d'un élément de microsurface qui protège un revêtement attenant formant une barrière thermique |
US9243511B2 (en) | 2014-02-25 | 2016-01-26 | Siemens Aktiengesellschaft | Turbine abradable layer with zig zag groove pattern |
US9151175B2 (en) | 2014-02-25 | 2015-10-06 | Siemens Aktiengesellschaft | Turbine abradable layer with progressive wear zone multi level ridge arrays |
US10329205B2 (en) | 2014-11-24 | 2019-06-25 | Rolls-Royce Corporation | Bond layer for silicon-containing substrates |
US20160230570A1 (en) | 2015-02-11 | 2016-08-11 | Rolls-Royce High Temperature Composites Inc. | Modified atmosphere melt infiltration |
WO2016133581A1 (fr) | 2015-02-18 | 2016-08-25 | Siemens Aktiengesellschaft | Carénage de turbine à couche abradable ayant des arêtes et rainures composites non fléchies à trois angles |
WO2016133982A1 (fr) | 2015-02-18 | 2016-08-25 | Siemens Aktiengesellschaft | Formation de passages de refroidissement dans des composants en superalliage de turbine à combustion recouverts d'isolant thermique |
JP6616094B2 (ja) * | 2015-04-16 | 2019-12-04 | 株式会社iMott | 保護膜の製造方法 |
WO2017146726A1 (fr) * | 2016-02-26 | 2017-08-31 | Siemens Aktiengesellschaft | Matériau composite matriciel céramique à protection thermique améliorée |
CA2934545C (fr) * | 2016-06-30 | 2017-01-31 | Randel Brandstrom | Barre d'armature renforcee par des fibres dotee de sections formees |
US11795116B2 (en) * | 2016-12-21 | 2023-10-24 | Corning Incorporated | Ceramic assembly and method of forming the same |
CN107557591A (zh) * | 2017-09-29 | 2018-01-09 | 派罗特克(广西南宁)高温材料有限公司 | 一种带钢丝包布的石墨杆 |
DE102017218442A1 (de) * | 2017-10-16 | 2019-04-18 | Siemens Aktiengesellschaft | Strukturierung einer Oberfläche eines CMC und CMC-Bauteil |
US11524480B2 (en) * | 2018-06-22 | 2022-12-13 | Rolls-Royce Corporation | Adaptive microtexturing of a composite material |
CN108892539A (zh) * | 2018-07-27 | 2018-11-27 | 湖南省长宁炭素股份有限公司 | 一种具有SiC涂层的石墨材料及其制备方法 |
CN108911789A (zh) * | 2018-07-27 | 2018-11-30 | 湖南省长宁炭素股份有限公司 | 一种C/C复合材料表面SiC涂层的制备方法 |
CN110565358B (zh) * | 2019-08-20 | 2022-03-04 | 安徽省通信产业服务有限公司 | 一种导电布抗氧化层的制备方法 |
CN114829572A (zh) * | 2019-11-20 | 2022-07-29 | 阿普赛德食品公司 | 用于制备肉制品的装置和系统 |
US20240191358A1 (en) * | 2022-12-13 | 2024-06-13 | Pratt & Whitney Canada Corp. | Electroless deposited coating with stiffeners |
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FR642494A (fr) * | 1925-11-24 | 1928-08-29 | Procédé pour imprégner et revêtir les parois intérieures des récipients ou corps creux en béton ou matière analogue | |
US2596546A (en) * | 1948-08-31 | 1952-05-13 | Louis M Grimes | Method for making embossed pressure-sensitive tape |
US3310433A (en) * | 1963-09-18 | 1967-03-21 | Gen Electric | Ceramic article coated with silver containing oxygen and method of making same |
DE1665029B1 (de) * | 1966-01-25 | 1970-01-29 | Siemag Siegener Maschb Gmbh | Verfahren zur Vorbehandlung bei der Herstellung von Leiterplatten |
US4005991A (en) * | 1971-12-29 | 1977-02-01 | Toyo Kogyo Co., Ltd. | Metal made of steel plate and aluminum material |
FR2271364A1 (en) * | 1973-10-09 | 1975-12-12 | Humilier Gisele | Coating of granite for concrete surfaces - using granite chippings in a natural or plastic matrix |
US3930071A (en) * | 1973-11-14 | 1975-12-30 | Ford Motor Co | Process for coating the rubbing surfaces of the seal of the gas turbine regenerator |
JPS5626467B2 (fr) * | 1973-12-19 | 1981-06-18 | ||
US4109050A (en) * | 1976-12-09 | 1978-08-22 | General Electric Company | Coated silicon-based ceramic composites and method for making same |
DE2703814A1 (de) * | 1977-01-29 | 1978-08-03 | Greenspan Donald | Mit einem biologisch aktiven glas beschichtete aluminiumoxid-keramika und verfahren zu ihrer herstellung |
DE3004812C2 (de) * | 1980-02-09 | 1986-11-20 | Philips Patentverwaltung Gmbh, 2000 Hamburg | Küvette für die flammenlose Atom-Absorptions-Spektrokopie und Verfahren zu deren Herstellung |
US4515860A (en) * | 1982-09-10 | 1985-05-07 | Dart Industries Inc. | Self protecting carbon bodies and method for making same |
CA1258409A (fr) * | 1984-09-24 | 1989-08-15 | Robert A. Holzl | Corps de carbone resistant a l'oxydation, et sa fabrication |
US4673450A (en) * | 1985-01-22 | 1987-06-16 | The Boeing Company | Method of welding together graphite fiber reinforced thermoplastic laminates |
JPS6256388A (ja) * | 1985-09-02 | 1987-03-12 | 松下電器産業株式会社 | サ−マルヘツドの製造方法 |
-
1988
- 1988-11-29 US US07/277,141 patent/US5435889A/en not_active Expired - Fee Related
-
1989
- 1989-10-10 GB GB8922757A patent/GB2273718B/en not_active Expired - Fee Related
- 1989-11-15 JP JP01800043A patent/JP3090457B2/ja not_active Expired - Fee Related
- 1989-11-24 FR FR8915493A patent/FR2697016B1/fr not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US5435889A (en) | 1995-07-25 |
FR2697016A1 (fr) | 1994-04-22 |
GB2273718B (en) | 1994-11-30 |
JP3090457B2 (ja) | 2000-09-18 |
GB8922757D0 (en) | 1994-03-09 |
JPH06287092A (ja) | 1994-10-11 |
GB2273718A (en) | 1994-06-29 |
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