LU64998A1 - - Google Patents

Info

Publication number
LU64998A1
LU64998A1 LU64998DA LU64998A1 LU 64998 A1 LU64998 A1 LU 64998A1 LU 64998D A LU64998D A LU 64998DA LU 64998 A1 LU64998 A1 LU 64998A1
Authority
LU
Luxembourg
Application number
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 filed Critical
Publication of LU64998A1 publication Critical patent/LU64998A1/xx

Links

Classifications

    • 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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/04—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by at least one layer folded at the edge, e.g. over another layer ; characterised by at least one layer enveloping or enclosing a 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
    • B29C44/22—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length consisting of at least two parts of chemically or physically different materials, e.g. having different densities
    • 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
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • 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
    • B29C48/14—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the particular extruding conditions, e.g. in a modified atmosphere or by using vibration
    • B29C48/147—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the particular extruding conditions, e.g. in a modified atmosphere or by using vibration after the die nozzle
    • B29C48/1472—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the particular extruding conditions, e.g. in a modified atmosphere or by using vibration after the die nozzle at the die nozzle exit zone
    • 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
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • 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
    • B29C48/30—Extrusion nozzles or dies
    • 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
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
    • 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
    • B32B1/00—Layered products having a non-planar shape
    • B32B1/08—Tubular products
    • 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
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/28—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding involving assembly of non-flat intermediate products which are flattened at a later step, e.g. tubes
    • 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
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/022—Mechanical properties
    • 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
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/004—Shaping under special conditions
    • B29C2791/007—Using fluid under 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0017—Combinations of extrusion moulding with other shaping operations combined with blow-moulding or thermoforming
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • 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
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • 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
    • B32B2597/00—Tubular articles, e.g. hoses, pipes
    • 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
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
LU64998D 1971-03-23 1972-03-20 LU64998A1 (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2114065A DE2114065C2 (de) 1971-03-23 1971-03-23 Verfahren zur Herstellung von Folien aus thermoplastischen Kunststoffen mit Klebereigenschaft

Publications (1)

Publication Number Publication Date
LU64998A1 true LU64998A1 (it) 1972-07-10

Family

ID=5802503

Family Applications (1)

Application Number Title Priority Date Filing Date
LU64998D LU64998A1 (it) 1971-03-23 1972-03-20

Country Status (24)

Country Link
US (2) US3880691A (it)
JP (1) JPS565648B1 (it)
AT (1) AT351752B (it)
AU (1) AU466477B2 (it)
BE (1) BE781153A (it)
CA (1) CA1001376A (it)
CH (1) CH540971A (it)
DD (1) DD95278A5 (it)
DE (1) DE2114065C2 (it)
DK (1) DK137918C (it)
ES (1) ES401053A1 (it)
FI (1) FI56637C (it)
FR (1) FR2130569B1 (it)
GB (1) GB1392841A (it)
IE (1) IE36438B1 (it)
IL (1) IL39048A (it)
IT (1) IT950500B (it)
LU (1) LU64998A1 (it)
NL (1) NL172926C (it)
NO (1) NO139258C (it)
SE (1) SE394262B (it)
SU (1) SU671708A3 (it)
YU (1) YU74172A (it)
ZA (1) ZA721839B (it)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2114065C2 (de) * 1971-03-23 1982-08-19 Heinrich Pannenbecker Verfahren zur Herstellung von Folien aus thermoplastischen Kunststoffen mit Klebereigenschaft
GB1517205A (en) 1975-10-17 1978-07-12 Ici Ltd Thermosetting-thermoplastic polyester composites
US4211741A (en) * 1977-04-07 1980-07-08 Sunlite Plastics, Inc. Extrusion process for laminated medical-surgical tubing
FR2415000A1 (fr) * 1978-01-20 1979-08-17 Ugine Kuhlmann Materiau composite polyfluorure de vinylidene et polyurethane obtenu par coextrusion
DE2905744A1 (de) * 1979-02-15 1980-09-18 Thyssen Industrie Verfahren zum herstellen von armaturengehaeusen aus metall, insbesondere aus stahl, vorzugsweise zum herstellen von schiebergehaeusen, und vorrichtung zum durchfuehren des verfahrens
WO1983002747A1 (en) * 1982-02-04 1983-08-18 Composite Container Corp Thermoforming coextruded plastic sheets
IT1153003B (it) * 1982-11-03 1987-01-14 Grace W R & Co Pellicole laminate per imballaggio e relativi manufatti a migliorata resistenza a trattamenti termici
US4629650A (en) * 1982-12-30 1986-12-16 Asahi Kasei Kogyo Kabushiki Kaisha Process for producing molded thermoplastic resin
JPS59178274A (ja) * 1983-03-29 1984-10-09 Tohoku Richo Kk 印字装置の用紙送り機構
JPS59178275A (ja) * 1983-03-29 1984-10-09 Tohoku Richo Kk 印字装置の用紙送り機構
JPS6026858U (ja) * 1983-08-01 1985-02-23 松下電器産業株式会社 給紙装置
AU603076B2 (en) * 1985-12-09 1990-11-08 W.R. Grace & Co.-Conn. Polymeric products and their manufacture
FR2609663B1 (fr) * 1987-01-21 1989-05-05 Atochem Procede de fabrication de films a partir de polymeres fluides semi-cristallins, par coextrusion et soufflage de gaine
US5569421A (en) * 1987-05-30 1996-10-29 Lin Tec Verpackungstechnik Gmbh Process for the production of a foldable blank of plastic foam by cold forming
AU3542789A (en) * 1988-05-26 1989-12-12 Family Health International Condom article and method of making the same
US5061549A (en) * 1990-03-20 1991-10-29 Shores A Andrew Substrate attach adhesive film, application method and devices incorporating the same
US5254401A (en) * 1990-11-29 1993-10-19 The Dow Chemical Company Packaging material for controlled atmosphere packaging
US5358785A (en) * 1991-05-28 1994-10-25 Fuji Photo Film Co., Ltd. Laminated film and process for producing the same
DE19525971A1 (de) * 1995-07-17 1997-01-23 Wolff Walsrode Ag Trennschichtfreie Dublofolie, Verfahren zu ihrer Herstellung sowie ihre Verwendung
DE19725538A1 (de) 1997-06-17 1998-12-24 Wolff Walsrode Ag Trennschichtfreie, wickelbare einschichtige Schmelzklebefolie
US7578803B2 (en) * 2004-03-18 2009-08-25 C. R. Bard, Inc. Multifunction adaptor for an open-ended catheter
US20070092712A1 (en) * 2005-10-25 2007-04-26 Hodson Simon K Articles having a moisture-resistant protective coating and methods of manufacturing such articles
DE102007022140A1 (de) 2007-05-11 2008-11-13 L + L Maschinenbau Gmbh & Co. Kg Verbundbauteil aus Polyurethan mit oder ohne Füllstoff mit einer äußeren Klebstoffbeschichtung zur späteren Herstellung eines Verbundkörpers sowie Verfahren und Vorrichtung zur Herstellung des Verbundbauteils
US8147639B2 (en) * 2008-05-22 2012-04-03 Tripartisan Technologies, Llc Process for manufacturing free standing thermoplastic polymeric films
RU2011100165A (ru) * 2008-06-12 2012-07-20 Крейн Энд Ко., Инк. (Us) Способ улучшения адгезии между защитным элементом и волокнистым листовым материалом
DE102008038375A1 (de) 2008-08-19 2010-02-25 Epurex Films Gmbh & Co. Kg Thermoplastische Mehrschichtfolie zur Gewebekaschierung und ein Verfahren zu ihrer Herstellung
EP2547332B1 (en) 2010-03-16 2018-08-29 Titan Pharmaceuticals, Inc. Heterogeneous implantable devices for drug delivery
CN109208857A (zh) * 2017-07-03 2019-01-15 陆钉毅 编织布层状结构的塑胶地板成型方法

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA713477A (en) * 1965-07-13 W.R. Grace And Co. Method for preparing a film of a vinylidene chloride polymer
US3187982A (en) * 1960-07-21 1965-06-08 Union Carbide Corp Method for forming coated uniaxially oriented films and the product formed thereby
US4379117A (en) * 1961-12-05 1983-04-05 W. R. Grace & Co. Method for preparing a film of vinylidene chloride polymer
US4048428A (en) * 1961-12-05 1977-09-13 W. R. Grace & Co. Method for preparing a film of vinylidene chloride polymer
US3223761A (en) * 1962-04-30 1965-12-14 Union Carbide Corp Melt extrusion of multi-wall plastic tubing
US3299192A (en) * 1963-06-11 1967-01-17 Haveg Industries Inc Method of extruding a foamed plastic tube having internal and external skins thereon
US3337665A (en) * 1964-10-12 1967-08-22 Union Carbide Corp Method for the production of thermoplastic film
DE1504264A1 (de) * 1964-12-31 1969-09-04 Feldmuehle Ag Verfahren zur Herstellung eines mehrschichtigen Kunststoffschlauches
US3322870A (en) * 1965-04-06 1967-05-30 Union Carbide Corp Method of producing clear, crystalline, high-gloss thermoplastic film
US3567539A (en) * 1967-08-11 1971-03-02 Grace W R & Co Method of making a tubular thermoplastic laminate
DE2114065C2 (de) * 1971-03-23 1982-08-19 Heinrich Pannenbecker Verfahren zur Herstellung von Folien aus thermoplastischen Kunststoffen mit Klebereigenschaft

Also Published As

Publication number Publication date
IT950500B (it) 1973-06-20
IE36438B1 (en) 1976-11-10
IL39048A (en) 1976-04-30
NL172926B (nl) 1983-06-16
FI56637B (fi) 1979-11-30
SU671708A3 (ru) 1979-06-30
NL7203831A (it) 1972-09-26
YU74172A (en) 1982-02-28
DK137918C (da) 1978-10-30
DD95278A5 (it) 1973-01-20
ATA221472A (de) 1979-01-15
CA1001376A (en) 1976-12-14
USRE31856E (en) 1985-03-26
US3880691A (en) 1975-04-29
ZA721839B (en) 1972-12-27
IL39048A0 (en) 1972-05-30
AU466477B2 (en) 1973-09-27
AT351752B (de) 1979-08-10
DK137918B (da) 1978-06-05
CH540971A (de) 1973-08-31
GB1392841A (en) 1975-04-30
DE2114065C2 (de) 1982-08-19
FR2130569B1 (it) 1976-08-06
FI56637C (fi) 1980-03-10
DE2114065A1 (de) 1972-10-05
FR2130569A1 (it) 1972-11-03
SE394262B (sv) 1977-06-20
ES401053A1 (es) 1975-07-01
NO139258C (no) 1979-01-31
NL172926C (nl) 1983-11-16
AU4025672A (en) 1973-09-27
BE781153A (fr) 1972-09-25
JPS565648B1 (it) 1981-02-06
NO139258B (no) 1978-10-23

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