AT346080B - METHOD FOR PRODUCING A COMPENSATED, NON-WOVEN FIBER STRUCTURE MADE FROM AT LEAST ONE FIBER STRIP - Google Patents

METHOD FOR PRODUCING A COMPENSATED, NON-WOVEN FIBER STRUCTURE MADE FROM AT LEAST ONE FIBER STRIP

Info

Publication number
AT346080B
AT346080B AT219375A AT219375A AT346080B AT 346080 B AT346080 B AT 346080B AT 219375 A AT219375 A AT 219375A AT 219375 A AT219375 A AT 219375A AT 346080 B AT346080 B AT 346080B
Authority
AT
Austria
Prior art keywords
compensated
producing
structure made
fiber
strip
Prior art date
Application number
AT219375A
Other languages
German (de)
Other versions
ATA219375A (en
Original Assignee
Bekaert Sa Nv
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 Bekaert Sa Nv filed Critical Bekaert Sa Nv
Publication of ATA219375A publication Critical patent/ATA219375A/en
Application granted granted Critical
Publication of AT346080B publication Critical patent/AT346080B/en

Links

Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H13/00—Other non-woven fabrics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2003—Glass or glassy material
    • B01D39/2017—Glass or glassy material the material being filamentary or fibrous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2027—Metallic material
    • B01D39/2041—Metallic material the material being filamentary or fibrous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2055—Carbonaceous material
    • B01D39/2065—Carbonaceous material the material being fibrous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2068—Other inorganic materials, e.g. ceramics
    • B01D39/2082—Other inorganic materials, e.g. ceramics the material being filamentary or fibrous
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4209—Inorganic fibres
    • D04H1/4218—Glass fibres
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4209—Inorganic fibres
    • D04H1/4234—Metal fibres
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4326—Condensation or reaction polymers
    • D04H1/4334—Polyamides
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/74—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being orientated, e.g. in parallel (anisotropic fleeces)
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/002—Inorganic yarns or filaments
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
    • D04H5/02—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/02—Types of fibres, filaments or particles, self-supporting or supported materials
    • B01D2239/0241—Types of fibres, filaments or particles, self-supporting or supported materials comprising electrically conductive fibres or particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0471—Surface coating material
    • B01D2239/0478—Surface coating material on a layer of the filter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0471—Surface coating material
    • B01D2239/0492—Surface coating material on fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/0604—Arrangement of the fibres in the filtering material
    • B01D2239/0627—Spun-bonded
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/0604—Arrangement of the fibres in the filtering material
    • B01D2239/064—The fibres being mixed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/065—More than one layer present in the filtering material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/065—More than one layer present in the filtering material
    • B01D2239/0659—The layers being joined by needling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/1233—Fibre diameter

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Nonwoven Fabrics (AREA)
AT219375A 1974-03-22 1975-03-21 METHOD FOR PRODUCING A COMPENSATED, NON-WOVEN FIBER STRUCTURE MADE FROM AT LEAST ONE FIBER STRIP AT346080B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7403948A NL7403948A (en) 1974-03-22 1974-03-22 PROCESS FOR MANUFACTURE OF A FIBER FIBER AND A FIBER FIBER THIS OBTAINED.

Publications (2)

Publication Number Publication Date
ATA219375A ATA219375A (en) 1978-02-15
AT346080B true AT346080B (en) 1978-10-25

Family

ID=19821024

Family Applications (1)

Application Number Title Priority Date Filing Date
AT219375A AT346080B (en) 1974-03-22 1975-03-21 METHOD FOR PRODUCING A COMPENSATED, NON-WOVEN FIBER STRUCTURE MADE FROM AT LEAST ONE FIBER STRIP

Country Status (17)

Country Link
JP (1) JPS50126978A (en)
AT (1) AT346080B (en)
AU (1) AU7874475A (en)
BE (1) BE825914A (en)
BR (1) BR7501691A (en)
CH (1) CH589739A5 (en)
DE (2) DE2512621A1 (en)
DK (1) DK119175A (en)
ES (1) ES435865A1 (en)
FR (1) FR2273101B3 (en)
GB (1) GB1490116A (en)
IE (1) IE40870B1 (en)
IT (1) IT1032375B (en)
LU (1) LU71980A1 (en)
NL (1) NL7403948A (en)
SE (1) SE7503071L (en)
ZA (1) ZA751190B (en)

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS532605A (en) * 1976-06-24 1978-01-11 Ichikawa Woolen Textile Production of paper making felt
JPS532675A (en) * 1976-06-30 1978-01-11 Ichikawa Woolen Textile Manufacture of wideewidth needle felt
JPS5314878A (en) * 1976-07-21 1978-02-09 Ichikawa Woolen Textile Manufacture of unwoven fabric with optional width
DE2746796C2 (en) * 1977-10-18 1988-06-16 Grünzweig + Hartmann und Glasfaser AG, 6700 Ludwigshafen Process for the production of a composite mat in the form of a molded part for lining silencers on exhaust pipes
JPS54106377U (en) * 1977-12-23 1979-07-26
AU517708B2 (en) * 1978-01-12 1981-08-20 Dunlop Limited Carbon composite brake disc manufacture
US4590122A (en) * 1980-12-18 1986-05-20 Fiberite Corporation High conductivity graphite material with electrically conductive filaments wrapped around warp and fill elements
JPS58143885U (en) * 1982-03-23 1983-09-28 オリエンタル・アスベスト株式会社 Glass non-woven fabric with carbon fiber yarn
JPS58143886U (en) * 1982-03-23 1983-09-28 オリエンタル・アスベスト株式会社 Glass non-woven fabric with metal fiber thread
IT1162865B (en) * 1983-05-23 1987-04-01 Fiat Auto Spa ELECTRICALLY CONDUCTIVE FILTER PAPER AND FILTER USING SUCH PAPER
FR2566437B1 (en) * 1984-06-26 1986-12-26 Lnt DEFORMABLE AND EXTENSIBLE COMPOSITE FABRIC IN ALL DIRECTIONS, INCLUDING METALLIC ELEMENTS
DE3724327A1 (en) * 1987-07-22 1989-02-09 Lohmann Gmbh & Co Kg SHOE INSOLE, IN PARTICULAR INTERMEDIATE OR INSOLE
GB8723861D0 (en) * 1987-10-10 1988-01-27 Lantor Uk Ltd Improvements in or relating to non-woven fabrics
JP3091972B2 (en) * 1990-05-26 2000-09-25 鈴木 誠 Web mixed with different fiber materials and method and apparatus for manufacturing decorative yarn using the web
IT1241450B (en) * 1990-12-27 1994-01-17 Saval Srl NON-WOVEN TEXTILE MATERIAL REALIZED THROUGH AN INTIMATE MIXING PROCESS OF FIBERS AND CONTINUOUS FILAMENTS OF SYNTHETIC AND / OR NATURAL POLYMERS.
DE4109692C2 (en) * 1991-03-23 1995-06-22 Filzfabrik Schwabach Gmbh Process for making felted felt
EP0709508A1 (en) * 1994-10-25 1996-05-01 Schuller International, Inc. Method of forming a blanket of uniform thickness
DE19960694B4 (en) * 1999-12-16 2005-02-10 Johns Manville Europe Gmbh Process for producing an insulating body molding and Isolierkörperformteil for cryogenic insulation
DE10031591B4 (en) * 2000-06-29 2005-11-17 Bwf Tec Gmbh & Co. Kg Textile composite material
BE1018937A3 (en) * 2009-09-24 2011-11-08 Wattex Nv METHOD FOR MANUFACTURING A STRENGTHENED FLANGE, IN PARTICULAR FOR A BITUMINARY ROOF JOB.
GB201017306D0 (en) * 2010-10-13 2010-11-24 Ecotechnilin Ltd Fibre mats
ITMI20130733A1 (en) * 2013-05-07 2014-11-08 Filtecno S R L COMPOSITE STRUCTURE OF NON-WOVEN FABRIC, METHOD AND EQUIPMENT FOR ITS PRODUCTION
CN103752085A (en) * 2013-12-09 2014-04-30 吴江市蓓盛纺织品有限公司 Novel filtration cloth
CN104711775B (en) * 2015-04-01 2017-07-21 赵晓明 A kind of continuous decentralized filament fiber Nomex and preparation method thereof
HK1252031A1 (en) * 2015-07-13 2019-05-10 可乐丽贸易株式会社 Nonwoven fabric composite and method for manufacturing same
CN107050998A (en) * 2017-02-27 2017-08-18 辽宁鸿盛环境技术集团有限公司 A kind of woven filtrate of inorfil and preparation method
WO2019231580A1 (en) * 2018-05-29 2019-12-05 Nike, Inc. Method for nonwoven textiles with variable zonal properties
CN108411493B (en) * 2018-05-30 2024-01-05 河北祥致家纺有限公司 Clamping and carrying type auxiliary net machine
CN113846424B (en) * 2021-09-26 2022-11-15 航天特种材料及工艺技术研究所 Mullite fiber needled felt and preparation method thereof
DE102022110033A1 (en) 2022-04-26 2023-10-26 Röchling Automotive SE Method for producing a fleece with reinforcement running in the fleece material and such fleece
CN118065057A (en) * 2024-04-03 2024-05-24 北京服装学院 A kind of felt fabric based on needle punching technology and preparation method thereof
CN118910814B (en) * 2024-07-19 2025-10-24 浙江爱德荣新材料有限公司 A method for using a novel long velvet flake processing device

Also Published As

Publication number Publication date
BE825914A (en) 1975-08-25
IE40870L (en) 1975-09-22
IE40870B1 (en) 1979-08-29
SE7503071L (en) 1975-09-23
DE7509146U (en) 1978-04-20
ATA219375A (en) 1978-02-15
ES435865A1 (en) 1977-03-01
DK119175A (en) 1975-09-23
ZA751190B (en) 1976-01-28
AU7874475A (en) 1976-09-09
NL7403948A (en) 1975-09-24
DE2512621A1 (en) 1975-09-25
CH589739A5 (en) 1977-07-15
FR2273101B3 (en) 1977-01-21
FR2273101A1 (en) 1975-12-26
LU71980A1 (en) 1975-08-20
BR7501691A (en) 1975-12-23
JPS50126978A (en) 1975-10-06
GB1490116A (en) 1977-10-26
IT1032375B (en) 1979-05-30

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