SE450293B - Radarmaskering - Google Patents

Radarmaskering

Info

Publication number
SE450293B
SE450293B SE8301908A SE8301908A SE450293B SE 450293 B SE450293 B SE 450293B SE 8301908 A SE8301908 A SE 8301908A SE 8301908 A SE8301908 A SE 8301908A SE 450293 B SE450293 B SE 450293B
Authority
SE
Sweden
Prior art keywords
fabric
metal
metal layer
radar
plastic layer
Prior art date
Application number
SE8301908A
Other languages
English (en)
Other versions
SE8301908D0 (sv
SE8301908L (sv
Inventor
L Karlsson
Original Assignee
Diab Barracuda Ab
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Diab Barracuda Ab filed Critical Diab Barracuda Ab
Priority to SE8301908A priority Critical patent/SE450293B/sv
Publication of SE8301908D0 publication Critical patent/SE8301908D0/sv
Priority to EP19840850093 priority patent/EP0122243B1/en
Priority to AT84850093T priority patent/ATE48051T1/de
Priority to DE8484850093T priority patent/DE3480509D1/de
Priority to GB8407546A priority patent/GB2137558B/en
Priority to CA000450524A priority patent/CA1214246A/en
Priority to NZ207671A priority patent/NZ207671A/en
Priority to FI841253A priority patent/FI77748C/sv
Priority to IL71384A priority patent/IL71384A0/xx
Priority to FR8404988A priority patent/FR2544064B1/fr
Priority to IN286/DEL/84A priority patent/IN163214B/en
Priority to DK175384A priority patent/DK161990C/da
Priority to US06/597,163 priority patent/US4557965A/en
Priority to JP59068346A priority patent/JPS59198008A/ja
Priority to ES1984286972U priority patent/ES286972Y/es
Priority to AU26665/84A priority patent/AU566113B2/en
Priority to NO841384A priority patent/NO841384L/no
Priority to IT2042384A priority patent/IT1175468B/it
Priority to CH1756/84A priority patent/CH662877A5/de
Priority to BE0/212718A priority patent/BE899361A/fr
Publication of SE8301908L publication Critical patent/SE8301908L/sv
Priority to US06/771,495 priority patent/US4606966A/en
Publication of SE450293B publication Critical patent/SE450293B/sv
Priority to MY462/87A priority patent/MY8700462A/xx

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
    • H01Q17/005—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems using woven or wound filaments; impregnated nets or clothes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/20—Inorganic coating
    • B32B2255/205—Metallic coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/202—Conductive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2323/00—Polyalkenes
    • B32B2323/04—Polyethylene
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S2/00—Apparel
    • Y10S2/90—Camouflaged
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/919—Camouflaged article
    • 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.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/2481—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including layer of mechanically interengaged strands, strand-portions or strand-like strips
    • 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.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24917—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including metal layer
    • 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
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
    • Y10T442/3146—Strand material is composed of two or more polymeric materials in physically distinct relationship [e.g., sheath-core, side-by-side, islands-in-sea, fibrils-in-matrix, etc.] or composed of physical blend of chemically different polymeric materials or a physical blend of a polymeric material and a filler material
    • Y10T442/3171—Strand material is a blend of polymeric material and a filler material
    • 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
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/637—Including strand or fiber material which is a monofilament composed of two or more polymeric materials in physically distinct relationship [e.g., sheath-core, side-by-side, islands-in-sea, fibrils-in-matrix, etc.] or composed of physical blend of chemically different polymeric materials or a physical blend of a polymeric material and a filler material
    • Y10T442/642—Strand or fiber material is a blend of polymeric material and a filler material

Landscapes

  • Laminated Bodies (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Surgical Instruments (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Bidet-Like Cleaning Device And Other Flush Toilet Accessories (AREA)
  • Superstructure Of Vehicle (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)
  • Treating Waste Gases (AREA)
  • Aerials With Secondary Devices (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
  • Traffic Control Systems (AREA)

Description

15 20 25 30 35 450 293 mellan plastskiktet och Väven finns en tunt metallfolie, som vid lamineringen mot väven blivit krakelerat.
Det är lämpligt om de elektriskt ledande fibrerna är längre än 3 cm.
Det är också lämpligt att som plastskikt använda ett skikt som medför låg emissionsfaktor inom våglängdsområdena 3-5 och 8-14/um. Detta kan uppnås genom att man använder polyetylen.
Uppfinningen kommer nu att belysas genom beskrivning av ett utföringsexempel och i anslutning till figurerna, där fig 1 visar reflexionen som funktion av våglängden vid olika typer av reflekterande material. Fig 2 visar ett utföringsexempel av uppfinningen.
I fig 1 visar den streckade kurvan reflexionens våglängds- oeroende för en väv med metallfibrer i, vilken alltså från en reflexion om 60% vid våglängden 30 mm sjunker till 2,5? vid 3 mm.
Motsvarande värden för en kombinerad maskering enligt uppfin- ningen har utmärkts med ringar, och man ser att vid 3 mm har reflexionsförmâgan ökat till 40%. Vid våglängden 0.01 mm har man reflexionsförmågan 30%. Om metallytan varit på utsidan, så hade ett väsentligt högre värde erhållits, men här bbfiïw P°¥F*ï@fl i folien till en undertryckning till ett lämpligt värde.
UTFÖRINGSÉXEMPEL En polyamidväv 1 med 13/13 trådar per centimeter användes som bärare, där varannan tråd är heldragen multifil tråd och var- annan trâd är spunnen och innehåller nâgra procent metallfioril- ler tunnare än 20/um i diameter och längre än 3 cm före inspin- ningen. Den spunna tråden behövs för att få med metallfibern medan den heldragna behövs för att få hög drag- och rivstyrka.
Väven 1 är redan infärgad grön för att få kamoflageegenskaper.
Den lamineras enligt fig 2 under värme till en vakuummetalliserad polyeten 3 med en limfilm 2 emellan. En matterad releasebärare 5 får följa med vid lamineringen för att ge polyetenfolien en matt yta. I Värmen och trycket gör att väven 1 delvis sjunker in i den metalliserade ytan 4 och förstör dess elektriskt ledande egen- skaper. Ytan.4 krakelerar också hos metallen då polyetenet 3 delvis smälter vid lamineringen.
Med denna folie har vi uppnått de tidigare beskrivna resultaten f» n

Claims (3)

10 15 450 293 Patentkrav
1. Radarmaskering, vari ingår en väv (1) och ett därpå lami- nerat plastskikt (3), kombinationen, att i väven ingår elektriskt ledande fibrer k ä n n e t e c k n a d av den tunnare än 20 /um, samt att mellan plastskiktet (3) och väven finns ett tunt metallskikt (4), som vid lamineringen mot väven blivit krakelerat.
2. Radarmaskering enligt krav 1, k ä n n e t e c k n a d av att fibrerna är längre än 3 cm.
3. Radarmaskering enligt krav 1 eller 2, k ä n n e t e c k - n a d av att plastskiktet är av polyetylen samt fäst vid Väven (1) medelst en limfilm (2).
SE8301908A 1983-04-07 1983-04-07 Radarmaskering SE450293B (sv)

Priority Applications (22)

Application Number Priority Date Filing Date Title
SE8301908A SE450293B (sv) 1983-04-07 1983-04-07 Radarmaskering
EP19840850093 EP0122243B1 (en) 1983-04-07 1984-03-22 A method for manufacturing a radar camouflage material
AT84850093T ATE48051T1 (de) 1983-04-07 1984-03-22 Verfahren zur herstellung eines radartarnungsmaterial.
DE8484850093T DE3480509D1 (en) 1983-04-07 1984-03-22 A method for manufacturing a radar camouflage material
GB8407546A GB2137558B (en) 1983-04-07 1984-03-23 Radar camouflage material
CA000450524A CA1214246A (en) 1983-04-07 1984-03-27 Radar camouflage material
NZ207671A NZ207671A (en) 1983-04-07 1984-03-28 Radar camouflage material
FI841253A FI77748C (sv) 1983-04-07 1984-03-29 Radarmaskering.
IL71384A IL71384A0 (en) 1983-04-07 1984-03-29 Radar camouflage material
FR8404988A FR2544064B1 (fr) 1983-04-07 1984-03-30 Materiau de camouflage anti-radar
IN286/DEL/84A IN163214B (sv) 1983-04-07 1984-03-31
DK175384A DK161990C (da) 1983-04-07 1984-04-02 Radarmaskering
JP59068346A JPS59198008A (ja) 1983-04-07 1984-04-05 レ−ダ用迷彩材料
US06/597,163 US4557965A (en) 1983-04-07 1984-04-05 Camouflage controlling reflection of both long and short radar waves
ES1984286972U ES286972Y (es) 1983-04-07 1984-04-06 Un dispositivo de camuflaje para radar
AU26665/84A AU566113B2 (en) 1983-04-07 1984-04-06 Radar camouflage material
NO841384A NO841384L (no) 1983-04-07 1984-04-06 Radarkamuflasje
IT2042384A IT1175468B (it) 1983-04-07 1984-04-06 Materiale di mimetizzazione per radar
CH1756/84A CH662877A5 (de) 1983-04-07 1984-04-06 Radar-tarnmaterial.
BE0/212718A BE899361A (fr) 1983-04-07 1984-04-06 Materiau de camouflage anti-radar.
US06/771,495 US4606966A (en) 1983-04-07 1985-08-30 Camouflage controlling reflection of both long and short radar waves
MY462/87A MY8700462A (en) 1983-04-07 1987-12-30 Radar camouflage material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8301908A SE450293B (sv) 1983-04-07 1983-04-07 Radarmaskering

Publications (3)

Publication Number Publication Date
SE8301908D0 SE8301908D0 (sv) 1983-04-07
SE8301908L SE8301908L (sv) 1984-10-08
SE450293B true SE450293B (sv) 1987-06-15

Family

ID=20350684

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8301908A SE450293B (sv) 1983-04-07 1983-04-07 Radarmaskering

Country Status (20)

Country Link
US (2) US4557965A (sv)
EP (1) EP0122243B1 (sv)
JP (1) JPS59198008A (sv)
AT (1) ATE48051T1 (sv)
AU (1) AU566113B2 (sv)
BE (1) BE899361A (sv)
CA (1) CA1214246A (sv)
CH (1) CH662877A5 (sv)
DE (1) DE3480509D1 (sv)
DK (1) DK161990C (sv)
ES (1) ES286972Y (sv)
FI (1) FI77748C (sv)
FR (1) FR2544064B1 (sv)
GB (1) GB2137558B (sv)
IN (1) IN163214B (sv)
IT (1) IT1175468B (sv)
MY (1) MY8700462A (sv)
NO (1) NO841384L (sv)
NZ (1) NZ207671A (sv)
SE (1) SE450293B (sv)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3508888A1 (de) * 1985-03-13 1986-09-25 Battelle-Institut E.V., 6000 Frankfurt Duennschichtabsorber fuer elektromagnetische wellen
GB2181898B (en) * 1985-10-21 1990-01-17 Plessey Co Plc Electro-magnetic wave absorber surface
US5576710A (en) * 1986-11-25 1996-11-19 Chomerics, Inc. Electromagnetic energy absorber
US5325094A (en) * 1986-11-25 1994-06-28 Chomerics, Inc. Electromagnetic energy absorbing structure
GB2608980B (en) * 1990-08-21 2024-04-10 Colebrand Ltd A protection device
US5066529A (en) * 1990-09-24 1991-11-19 Minnesota Mining And Manufacturing Company Camouflage wrapping tape
US5595801A (en) * 1991-07-30 1997-01-21 International Paper Company Laminated shielding material and method for shielding an enclosure therewith
FR2908560B1 (fr) * 1991-11-25 2009-09-25 Aerospatiale Soc Nat Ind Sa Materiau composite structural a peau et un procede pour la fabrication de celui-ci
GB9225444D0 (en) * 1992-12-04 1993-01-27 Secr Defence Radar attenuating textiles
JP2956875B2 (ja) * 1994-05-19 1999-10-04 矢崎総業株式会社 電磁遮蔽用成形材料
US6016746A (en) * 1997-08-19 2000-01-25 Micron Communications, Inc. Flip chip screen printing method
DE19816707C2 (de) * 1998-04-02 2002-09-26 Stamoid Ag Eglisau Verfahren zur Herstellung eines breitbandigen Tarnmaterials
DE19911227A1 (de) * 1999-03-13 2000-09-14 Forbo Stamoid Ag Eglisau Universelles Tarnmaterial für Tarnkleidung und sonstige Zwecke
DE20212487U1 (de) * 2002-08-14 2003-03-27 C.F. Ploucquet GmbH & Co, 89522 Heidenheim Wärmetarnplane
US8323778B2 (en) 2005-01-13 2012-12-04 Webb Alan C Environmentally resilient corrugated building products and methods of manufacture
US8013776B2 (en) * 2007-05-07 2011-09-06 Milliken & Company Radar camouflage fabric
US8916265B1 (en) * 2007-11-09 2014-12-23 W. L. Gore & Associates, Inc. Multi-spectral, selectively reflective construct
US9276324B2 (en) * 2007-11-09 2016-03-01 W. L. Gore & Associates, Inc. Multi-spectral, selectively reflective construct
CN101331989B (zh) * 2008-08-05 2013-06-26 徐汉强 多功能汽珠胶衣及其制造方法
US9587913B2 (en) 2013-01-18 2017-03-07 W. L. Gore & Associates, Inc. Incised composite material for selective, multispectral reflection
KR101677929B1 (ko) * 2016-06-20 2016-11-21 주식회사 동아티오엘 자카드 직기를 이용하여 제직한 위장복지 및 그 제직방법
KR101849295B1 (ko) * 2017-08-02 2018-04-16 주식회사 동아티오엘 자카드직기를 이용하여 3중직의 자카드조직으로 제직한 위장복지 및 그 제직방법

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3300781A (en) * 1965-05-27 1967-01-24 Nat Res Corp Radar countermeasure article
US3349397A (en) * 1966-02-03 1967-10-24 North American Aviation Inc Flexible radiation attenuator
DE1916326A1 (de) * 1968-04-01 1969-10-30 Barracudaverken Ab Tarnungsmittel zum Verhindern oder Hemmen der Entdeckung durch Radarerkundung
US4001827A (en) * 1975-04-16 1977-01-04 Barracudaverken Aktiebolag Camouflage material
US4034375A (en) * 1975-05-23 1977-07-05 Barracudaverken Aktiebolag Laminated camouflage material
DK144954C (da) * 1978-07-28 1983-11-07 Gottlieb Commercial Maatte til multispektral sloering af objekter eller anlaeg
DE3135271A1 (de) * 1981-09-05 1983-03-24 Günter Dr.-Ing. 6903 Neckargemünd Pusch Ir-reflektierende, flexible materialbahn

Also Published As

Publication number Publication date
FI841253A (fi) 1984-10-08
JPS59198008A (ja) 1984-11-09
GB8407546D0 (en) 1984-05-02
CH662877A5 (de) 1987-10-30
JPH0342721B2 (sv) 1991-06-28
ES286972Y (es) 1988-04-16
EP0122243A2 (en) 1984-10-17
FI841253A0 (fi) 1984-03-29
ATE48051T1 (de) 1989-12-15
BE899361A (fr) 1984-10-08
CA1214246A (en) 1986-11-18
IT8420423A0 (it) 1984-04-06
IN163214B (sv) 1988-08-20
DK161990B (da) 1991-09-02
DE3480509D1 (en) 1989-12-21
SE8301908D0 (sv) 1983-04-07
DK161990C (da) 1992-02-10
DK175384D0 (da) 1984-04-02
FR2544064B1 (fr) 1986-12-19
NZ207671A (en) 1987-10-30
DK175384A (da) 1984-10-08
US4606966A (en) 1986-08-19
SE8301908L (sv) 1984-10-08
FI77748C (sv) 1989-04-10
MY8700462A (en) 1987-12-31
GB2137558A (en) 1984-10-10
FI77748B (fi) 1988-12-30
AU566113B2 (en) 1987-10-08
FR2544064A1 (fr) 1984-10-12
GB2137558B (en) 1986-09-24
EP0122243B1 (en) 1989-11-15
ES286972U (es) 1985-12-01
AU2666584A (en) 1984-10-11
IT1175468B (it) 1987-07-01
US4557965A (en) 1985-12-10
NO841384L (no) 1984-10-08
EP0122243A3 (en) 1985-11-06

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