NO813801L - Apparat og fremgangsmaate for ekstrudering av etylenpolymerer - Google Patents
Apparat og fremgangsmaate for ekstrudering av etylenpolymererInfo
- Publication number
- NO813801L NO813801L NO813801A NO813801A NO813801L NO 813801 L NO813801 L NO 813801L NO 813801 A NO813801 A NO 813801A NO 813801 A NO813801 A NO 813801A NO 813801 L NO813801 L NO 813801L
- Authority
- NO
- Norway
- Prior art keywords
- segment
- thread
- screw
- extruder
- constant
- Prior art date
Links
- 229920000573 polyethylene Polymers 0.000 title claims description 26
- 238000000034 method Methods 0.000 title claims description 22
- 238000000605 extraction Methods 0.000 title 1
- 229920000642 polymer Polymers 0.000 claims description 41
- 229920001577 copolymer Polymers 0.000 claims description 20
- 238000002156 mixing Methods 0.000 claims description 18
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 14
- 230000007423 decrease Effects 0.000 claims description 14
- 239000005977 Ethylene Substances 0.000 claims description 13
- 230000003247 decreasing effect Effects 0.000 claims description 10
- 238000009826 distribution Methods 0.000 claims description 10
- 125000004432 carbon atom Chemical group C* 0.000 claims description 6
- 239000004711 α-olefin Substances 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 241001661918 Bartonia Species 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 21
- 239000000463 material Substances 0.000 description 15
- 239000003054 catalyst Substances 0.000 description 11
- 239000000155 melt Substances 0.000 description 11
- 229920003023 plastic Polymers 0.000 description 10
- 239000004033 plastic Substances 0.000 description 10
- 239000004698 Polyethylene Substances 0.000 description 8
- 238000001125 extrusion Methods 0.000 description 8
- 230000005484 gravity Effects 0.000 description 7
- 239000000178 monomer Substances 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
- 239000007787 solid Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 229920001519 homopolymer Polymers 0.000 description 6
- -1 polyethylene Polymers 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 239000010936 titanium Substances 0.000 description 5
- 239000000460 chlorine Substances 0.000 description 4
- 229920001038 ethylene copolymer Polymers 0.000 description 4
- 239000011888 foil Substances 0.000 description 4
- 239000002685 polymerization catalyst Substances 0.000 description 4
- 238000006116 polymerization reaction Methods 0.000 description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 3
- 239000011324 bead Substances 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 238000007334 copolymerization reaction Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 229920001684 low density polyethylene Polymers 0.000 description 3
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000000518 rheometry Methods 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical compound CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008685 targeting Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/535—Screws with thread pitch varying along the longitudinal axis
-
- 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
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of 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
- 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
-
- 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
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Treatment Of Liquids With Adsorbents In General (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/206,146 US4329313A (en) | 1980-11-12 | 1980-11-12 | Apparatus and method for extruding ethylene polymers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO813801L true NO813801L (no) | 1982-05-13 |
Family
ID=22765174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO813801A NO813801L (no) | 1980-11-12 | 1981-11-10 | Apparat og fremgangsmaate for ekstrudering av etylenpolymerer |
Country Status (15)
| Country | Link |
|---|---|
| US (1) | US4329313A (de) |
| EP (1) | EP0051880B1 (de) |
| JP (1) | JPS57107826A (de) |
| KR (1) | KR830007274A (de) |
| AR (1) | AR225850A1 (de) |
| AU (1) | AU7691581A (de) |
| BR (1) | BR8107269A (de) |
| CA (1) | CA1161232A (de) |
| DE (1) | DE3170186D1 (de) |
| DK (1) | DK499981A (de) |
| ES (2) | ES507033A0 (de) |
| FI (1) | FI813514L (de) |
| IN (1) | IN156554B (de) |
| NO (1) | NO813801L (de) |
| ZA (1) | ZA817480B (de) |
Families Citing this family (39)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4532189A (en) * | 1982-02-19 | 1985-07-30 | W. R. Grace & Co., Cryovac Div. | Linear polyethylene shrink films |
| US4798473A (en) * | 1983-04-29 | 1989-01-17 | Rauwendaal Christiaan J | Extruder screw |
| CH662531A5 (de) * | 1983-09-30 | 1987-10-15 | Netstal Ag Maschf Giesserei | Schnecken-plastifizier- und foerdereinrichtung einer kunststoff-spritzgiessmaschine. |
| US4617241A (en) * | 1984-01-23 | 1986-10-14 | W. R. Grace & Co., Cryovac Div. | Linear polyethylene stretch/shrink films |
| US4551380A (en) * | 1984-05-10 | 1985-11-05 | W. R. Grace & Co., Cryovac Div. | Oriented heat-sealable multilayer packaging film |
| US4514465A (en) * | 1984-05-30 | 1985-04-30 | W. R. Grace & Co., Cryovac Div. | Storm window film comprising at least five layers |
| JPS61144324A (ja) * | 1984-12-19 | 1986-07-02 | Idemitsu Petrochem Co Ltd | 熱可塑性樹脂の押出方法及びそれに用いる押出装置 |
| US4834913A (en) * | 1987-01-27 | 1989-05-30 | Aseltine Leroy G | Apparatus and method for forming finely divided dry materials from wet materials having a tendency to form lumps |
| US4770539A (en) * | 1987-07-06 | 1988-09-13 | Husky Injection Molding Systems Ltd. | Barrier screw |
| BE1002469A4 (nl) * | 1988-08-12 | 1991-02-19 | Euro Stel P V B A | Verbetering van het opsmeltproces in spuitgietmachines en van de schroeven voor de realisatie ervan. |
| US5108040A (en) * | 1989-04-28 | 1992-04-28 | Larry Koenig | Tapered auger shredder |
| US5207964A (en) * | 1991-02-13 | 1993-05-04 | Mauro James J | Method for manufacturing a plastic hollow product using water soluble resin |
| US5238633A (en) * | 1991-05-24 | 1993-08-24 | Duraplast Corporation | Method and apparatus for recycling plastic waste into a thin profile, mechanically reinforced board |
| US5156790A (en) * | 1991-07-25 | 1992-10-20 | Union Carbide Chemicals & Plastics Technology Corporation | Method for extruding ethylene polymers |
| JPH0620033U (ja) * | 1992-04-22 | 1994-03-15 | 株式会社竹野鉄工所 | プラスチックの押出し装置用スクリュー |
| US5356281A (en) * | 1992-08-10 | 1994-10-18 | Three Bond Co., Ltd. | Screw-type resin injection apparatus for injection molding |
| US5312224A (en) * | 1993-03-12 | 1994-05-17 | International Business Machines Corporation | Conical logarithmic spiral viscosity pump |
| US5800757A (en) * | 1994-03-31 | 1998-09-01 | Modern Technologies Corp. | System and method for molding a basketball backboard |
| US5591384A (en) * | 1994-03-31 | 1997-01-07 | Modern Technologies Corp. | Method for molding parts |
| US5651305A (en) * | 1995-05-30 | 1997-07-29 | Brown International, Inc. | Food product finisher |
| JP4021967B2 (ja) * | 1997-02-17 | 2007-12-12 | 三菱重工業株式会社 | 可塑化スクリュ |
| JP3755293B2 (ja) * | 1997-05-22 | 2006-03-15 | 日立金属株式会社 | 繊維強化熱可塑性樹脂の可塑化装置用スクリュおよび可塑化装置 |
| ES2203130T3 (es) * | 1998-05-07 | 2004-04-01 | Agrotechnology And Food Innovations B.V. | Proceso y aparato para la produccion continua de compuestos de polimero y fibras celulosicas. |
| EP1420933A1 (de) * | 2001-08-16 | 2004-05-26 | Société de Technologie Michelin | Verdrängerpumpe |
| JP4100326B2 (ja) * | 2003-10-29 | 2008-06-11 | 宇部興産機械株式会社 | 射出成形機の可塑化装置 |
| DE102004003448B3 (de) * | 2004-01-22 | 2005-11-10 | Nestle S.A. | Tieftemperaturextrusionsverfahren zur Mikrostrukturierung von gefrorenen, belüfteten Massen, beispielsweise Eiskrem, und Tieftemperaturextrusionsvorrichtung zum Durchführen dieses Verfahrens |
| DE102005015537A1 (de) * | 2005-04-04 | 2006-10-05 | Harburg-Freudenberger Maschinenbau Gmbh | Schnecken-Extruder zur Verarbeitung von Polymeren |
| US20140294504A1 (en) * | 2013-03-29 | 2014-10-02 | Somero Enterprises, Inc. | Concrete screeding machine with improved auger |
| JP6527742B2 (ja) | 2014-04-24 | 2019-06-05 | 東芝機械株式会社 | 押出機用スクリュ並びに押出機および押出方法 |
| JP6550253B2 (ja) | 2014-04-24 | 2019-07-24 | 東芝機械株式会社 | 押出機用スクリュ並びに押出機および押出方法 |
| JP6639799B2 (ja) | 2014-05-08 | 2020-02-05 | 東芝機械株式会社 | 混練装置および混練方法 |
| JP6639798B2 (ja) | 2014-05-08 | 2020-02-05 | 東芝機械株式会社 | 押出機用スクリュ並びに押出機および押出方法 |
| JP6639800B2 (ja) | 2014-05-08 | 2020-02-05 | 東芝機械株式会社 | 押出機用スクリュ並びに押出機および押出方法 |
| JP6446234B2 (ja) * | 2014-10-27 | 2018-12-26 | 東芝機械株式会社 | 押出機用スクリュ、スクリュエレメント、押出機および押出方法 |
| JP6746278B2 (ja) * | 2015-04-28 | 2020-08-26 | 芝浦機械株式会社 | 押出機用スクリュ並びに押出機および押出方法 |
| JP6464025B2 (ja) * | 2015-04-28 | 2019-02-06 | 東芝機械株式会社 | 押出機用スクリュ並びに押出機および押出方法 |
| FI129682B (en) * | 2016-08-26 | 2022-06-30 | Teknologian Tutkimuskeskus Vtt Oy | Single screw extruder and method |
| JP7136780B2 (ja) * | 2016-12-21 | 2022-09-13 | ビーエーエスエフ ソシエタス・ヨーロピア | 一軸押出機および一軸押出機の使用ならびに一軸押出機を用いて高吸収性ポリマ、つまりｓａｐポリマゲルの形態を変化させる方法 |
| RU176481U1 (ru) * | 2017-08-10 | 2018-01-22 | Федеральное государственное автономное образовательное учреждение высшего образования "Крымский федеральный университет имени В.И. Вернадского" | Экструдер для переработки разнородных отходов вторичных полимерных материалов |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2547000A (en) * | 1949-04-07 | 1951-04-03 | Western Electric Co | Apparatus for simultaneously advancing and plasticizing plastic compounds |
| US2702410A (en) * | 1951-06-21 | 1955-02-22 | Western Electric Co | Method of working and extruding plastic compounds |
| GB749919A (en) * | 1953-09-23 | 1956-06-06 | Harold Newby | Improvements in and apparatus for the production of blown foils of hard polyvinyl chloride |
| US2991870A (en) * | 1956-09-11 | 1961-07-11 | Griffith Edwin | Materials processing apparatus |
| US2997968A (en) * | 1957-07-15 | 1961-08-29 | Fitzpatrick Company | Mixing device |
| US3310836A (en) * | 1964-09-25 | 1967-03-28 | George B Nichols | Extruder, etc. |
| US3486192A (en) * | 1967-03-24 | 1969-12-30 | Union Carbide Corp | Apparatus for extrusion of thermoplastics |
| US3449793A (en) * | 1967-04-21 | 1969-06-17 | Intern Rubber Ind Inc | Machine for working rubber and like plastics |
| FR1589723A (de) * | 1968-09-06 | 1970-04-06 | ||
| US3850414A (en) * | 1972-12-26 | 1974-11-26 | H Scharer | Homogenizing extruders |
| JPS5156874A (en) * | 1974-11-14 | 1976-05-18 | Toray Industries | Konoryoku 2 suteejisukuryuu |
| US4006209A (en) * | 1975-02-10 | 1977-02-01 | Egan Machinery Company | Method for additive feeding |
| US4129386A (en) * | 1976-06-01 | 1978-12-12 | Akzona Incorporated | Extrusion apparatus |
| US4243619A (en) * | 1978-03-31 | 1981-01-06 | Union Carbide Corporation | Process for making film from low density ethylene hydrocarbon copolymer |
| US4343755A (en) * | 1978-09-06 | 1982-08-10 | Union Carbide Corporation | Process for extruding ethylene polymers |
| FR2472970A1 (fr) * | 1980-01-04 | 1981-07-10 | Saint Marcel Mfg | Organe de boudineuse tel que vis ou cylindre |
| US4310484A (en) * | 1980-08-01 | 1982-01-12 | Union Carbide Corporation | Method for extruding molten narrow molecular weight distribution, linear, ethylene copolymers |
-
1980
- 1980-11-12 US US06/206,146 patent/US4329313A/en not_active Expired - Lifetime
-
1981
- 1981-09-10 AR AR287393A patent/AR225850A1/es active
- 1981-10-28 ZA ZA817480A patent/ZA817480B/xx unknown
- 1981-10-28 AU AU76915/81A patent/AU7691581A/en not_active Abandoned
- 1981-10-30 CA CA000389146A patent/CA1161232A/en not_active Expired
- 1981-11-02 KR KR1019810004345A patent/KR830007274A/ko unknown
- 1981-11-09 FI FI813514A patent/FI813514L/fi not_active Application Discontinuation
- 1981-11-10 BR BR8107269A patent/BR8107269A/pt unknown
- 1981-11-10 NO NO813801A patent/NO813801L/no unknown
- 1981-11-10 IN IN1247/CAL/81A patent/IN156554B/en unknown
- 1981-11-11 JP JP56179871A patent/JPS57107826A/ja active Pending
- 1981-11-11 DK DK499981A patent/DK499981A/da not_active Application Discontinuation
- 1981-11-11 DE DE8181109633T patent/DE3170186D1/de not_active Expired
- 1981-11-11 EP EP81109633A patent/EP0051880B1/de not_active Expired
- 1981-11-11 ES ES507033A patent/ES507033A0/es active Granted
-
1982
- 1982-10-07 ES ES1982267672U patent/ES267672Y/es not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| EP0051880B1 (de) | 1985-04-24 |
| EP0051880A3 (en) | 1983-01-26 |
| AR225850A1 (es) | 1982-04-30 |
| CA1161232A (en) | 1984-01-31 |
| AU7691581A (en) | 1982-05-20 |
| ES267672U (es) | 1983-05-01 |
| DE3170186D1 (en) | 1985-05-30 |
| US4329313A (en) | 1982-05-11 |
| ES8308501A1 (es) | 1983-10-01 |
| ES267672Y (es) | 1983-11-16 |
| BR8107269A (pt) | 1982-07-27 |
| FI813514L (fi) | 1982-05-13 |
| DK499981A (da) | 1982-05-13 |
| KR830007274A (ko) | 1983-10-19 |
| ZA817480B (en) | 1982-10-27 |
| JPS57107826A (en) | 1982-07-05 |
| IN156554B (de) | 1985-08-31 |
| EP0051880A2 (de) | 1982-05-19 |
| ES507033A0 (es) | 1983-10-01 |
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