CS214873B2 - Shaping instrument one-or multipart of the machine for working the material in the plastic condition - Google Patents
Shaping instrument one-or multipart of the machine for working the material in the plastic condition Download PDFInfo
- Publication number
- CS214873B2 CS214873B2 CS765393A CS539376A CS214873B2 CS 214873 B2 CS214873 B2 CS 214873B2 CS 765393 A CS765393 A CS 765393A CS 539376 A CS539376 A CS 539376A CS 214873 B2 CS214873 B2 CS 214873B2
- Authority
- CS
- Czechoslovakia
- Prior art keywords
- passages
- forming tool
- mold
- cooling
- passage
- Prior art date
Links
- 239000000463 material Substances 0.000 title claims description 10
- 239000004033 plastic Substances 0.000 title claims description 8
- 229920003023 plastic Polymers 0.000 title claims description 8
- 238000007493 shaping process Methods 0.000 title 1
- 238000001816 cooling Methods 0.000 claims abstract description 41
- 239000002826 coolant Substances 0.000 claims description 42
- 239000006060 molten glass Substances 0.000 claims description 5
- 239000003507 refrigerant Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 239000012809 cooling fluid Substances 0.000 abstract 1
- 239000003570 air Substances 0.000 description 11
- 238000000465 moulding Methods 0.000 description 11
- 239000002184 metal Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 238000009826 distribution Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000011521 glass Substances 0.000 description 6
- 239000012080 ambient air Substances 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000007664 blowing Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 229910001060 Gray iron Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000002311 subsequent effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B9/00—Blowing glass; Production of hollow glass articles
- C03B9/30—Details of blowing glass; Use of materials for the moulds
- C03B9/38—Means for cooling, heating, or insulating glass-blowing machines or for cooling the glass moulded by the machine
- C03B9/3866—Details thereof relating to bottom moulds, e.g. baffles
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
- C03B11/12—Cooling, heating, or insulating the plunger, the mould, or the glass-pressing machine; cooling or heating of the glass in the mould
- C03B11/125—Cooling
- C03B11/127—Cooling of hollow or semi-hollow articles or their moulds
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B9/00—Blowing glass; Production of hollow glass articles
- C03B9/30—Details of blowing glass; Use of materials for the moulds
- C03B9/38—Means for cooling, heating, or insulating glass-blowing machines or for cooling the glass moulded by the machine
- C03B9/3816—Means for general supply, distribution or control of the medium to the mould, e.g. sensors, circuits, distribution networks
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B9/00—Blowing glass; Production of hollow glass articles
- C03B9/30—Details of blowing glass; Use of materials for the moulds
- C03B9/38—Means for cooling, heating, or insulating glass-blowing machines or for cooling the glass moulded by the machine
- C03B9/3825—Details thereof relating to plungers
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B9/00—Blowing glass; Production of hollow glass articles
- C03B9/30—Details of blowing glass; Use of materials for the moulds
- C03B9/38—Means for cooling, heating, or insulating glass-blowing machines or for cooling the glass moulded by the machine
- C03B9/3875—Details thereof relating to the side-wall, body or main part of the moulds
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2537037A DE2537037C3 (de) | 1975-08-20 | 1975-08-20 | Fluidgekühltes Formwerkzeug für schmelzflüssiges Glas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CS214873B2 true CS214873B2 (en) | 1982-06-25 |
Family
ID=5954395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS765393A CS214873B2 (en) | 1975-08-20 | 1976-08-19 | Shaping instrument one-or multipart of the machine for working the material in the plastic condition |
Country Status (17)
| Country | Link |
|---|---|
| US (1) | US4251253A (fr) |
| JP (1) | JPS5225816A (fr) |
| BE (1) | BE845000A (fr) |
| BR (1) | BR7605481A (fr) |
| CA (1) | CA1073212A (fr) |
| CH (1) | CH609955A5 (fr) |
| CS (1) | CS214873B2 (fr) |
| DE (1) | DE2537037C3 (fr) |
| DK (1) | DK150742C (fr) |
| FR (1) | FR2321376A1 (fr) |
| GB (1) | GB1533622A (fr) |
| IE (1) | IE44381B1 (fr) |
| IT (1) | IT1125209B (fr) |
| LU (1) | LU75614A1 (fr) |
| NL (1) | NL174340C (fr) |
| SU (1) | SU904512A3 (fr) |
| ZA (1) | ZA764986B (fr) |
Families Citing this family (53)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3040310C1 (de) * | 1980-10-25 | 1982-03-25 | Heye Hermann Fa | Druckfluidverteilvorrichtung fuer ein Formwerkzeug zur Verarbeitung von Glas und aehnlichen thermoplastischen Stoffen |
| GB2123401A (en) * | 1982-07-09 | 1984-02-01 | Emhart | Method of cooling a mould |
| DE3232288C1 (de) * | 1982-08-31 | 1983-10-20 | Fa. Hermann Heye, 3063 Obernkirchen | Verfahren und Vorrichtung zum Pressen eines Glaskuelbels |
| IN160666B (fr) * | 1982-09-03 | 1987-07-25 | Emhart Ind | |
| ZA836051B (en) * | 1982-09-03 | 1985-02-27 | Emhart Ind | Mould arrangement for glassware forming machine |
| GB8307462D0 (en) * | 1983-03-17 | 1983-04-27 | Emhart Ind | Mould for glassware forming machine |
| GB2131413B (en) * | 1982-11-30 | 1986-05-29 | Emhart Ind | Bottom plate mechanism for a mould of a glassware container manufacturing machine |
| WO1984003498A1 (fr) * | 1983-03-04 | 1984-09-13 | Emhart Ind | Refroidissement de moule de soufflage |
| US4528015A (en) * | 1983-03-04 | 1985-07-09 | Emhart Industries, Inc. | Glass forming blank and plunger cooling |
| GB8306145D0 (en) * | 1983-03-05 | 1983-04-13 | Emhart Ind | Moulded articles |
| GB2137980B (en) * | 1983-04-08 | 1987-01-21 | Emhart Ind | Cooling glassware - forming moulds |
| US4512792A (en) * | 1983-07-11 | 1985-04-23 | Owens-Illinois, Inc. | Cooling wind shut-off valve for glass forming mold |
| DE3336488A1 (de) * | 1983-10-07 | 1985-04-25 | Veba Glas Ag | Formwerkzeug fuer eine maschine zur verarbeitung schmelzfluessigen glases zu hohlglasartikeln |
| NL8303686A (nl) * | 1983-10-26 | 1985-05-17 | Philips Nv | Werkwijze voor het vervaardigen van holle glazen voorwerpen, voorwerp vervaardigd volgens de werkwijze en inrichting voor het uitvoeren van de werkwijze. |
| GB2151608B (en) * | 1983-12-20 | 1987-01-21 | Emhart Ind | Mould arrangement for a cyclicly operating glassware forming machine |
| GB2152493B (en) * | 1984-01-12 | 1987-02-04 | Emhart Ind | Mould arrangement for use in cyclicly operated glassware forming machine |
| GB2154229B (en) * | 1984-01-25 | 1987-05-07 | Emhart Ind | Cooling arrangement for a mould of a glassware forming machine of the individual section type |
| US4578104A (en) * | 1984-02-27 | 1986-03-25 | Emhart Industries, Inc. | Manufacture of moulded articles of glassware |
| US4629488A (en) * | 1984-12-19 | 1986-12-16 | Ball Corporation | Cooling system for neck ring and parison mold |
| CA1280603C (fr) * | 1984-12-19 | 1991-02-26 | Wilbur O. Doud | Systeme de refroidissement pour moule de goulot et de paraison |
| GB2170796B (en) * | 1985-02-13 | 1988-03-16 | Emhart Ind | Mould arrangement for a glassware forming machine |
| US4623374A (en) * | 1985-04-02 | 1986-11-18 | Ball Corporation | Cooling system for parison plunger |
| US4659357A (en) * | 1985-09-23 | 1987-04-21 | Ball Corporation | Fan air cooling of neck ring and parison mold |
| US4690703A (en) * | 1986-04-18 | 1987-09-01 | Emhart Industries, Inc. | Mold cooling arrangement for use in a glassware forming machine |
| US4668269A (en) * | 1986-06-19 | 1987-05-26 | Vidriera Monterrey, S.A. | System and method for the internal cooling of hot molds |
| IT1210779B (it) * | 1987-06-02 | 1989-09-20 | Bottero Spa | Complesso di stampi per unamacchina formatrice di articoli di vetro a funzionamento ciclico |
| US4842637A (en) * | 1987-06-26 | 1989-06-27 | Glass Technology Development Corp. | Glassware forming machine with cooling system |
| US4909823A (en) * | 1989-05-30 | 1990-03-20 | Liberty Glass Company | Glassware forming machine with cooling system |
| US5417730A (en) * | 1991-06-25 | 1995-05-23 | Canon Kabushiki Kaisha | Apparatus for molding an optical element |
| US5330551A (en) * | 1992-12-02 | 1994-07-19 | I.M.T.E.C. Enterprises, Inc. | Glassware forming machine with cooling system |
| US5358542A (en) * | 1992-12-09 | 1994-10-25 | American National Can Company | Glass container forming machine including neck ring mold cooling |
| US5656051A (en) * | 1993-06-14 | 1997-08-12 | Vidriera Monterrey, S.A. | Cooling method and mold arrangement for the manufacture of glass articles |
| US5632794A (en) * | 1995-05-31 | 1997-05-27 | Corning Incorporated | Method and apparatus for cooling a glass pressing plunger |
| FR2766172B1 (fr) * | 1997-07-17 | 1999-08-20 | Saint Gobain Emballage | Dispositif pour le refroidissement d'elements de moules, en particulier de moules pour la fabrication d'articles en verre |
| US6038889A (en) * | 1999-04-14 | 2000-03-21 | Libbey Glass Inc. | Cooling system for a glassware machine |
| KR100315355B1 (ko) * | 1999-08-26 | 2001-11-30 | 류정열 | 냉각용 히트 파이프를 구비한 트렁크 플로어용 금형 |
| US6412308B1 (en) | 1999-09-20 | 2002-07-02 | Owens-Brockway Glass Container Inc. | Liquid cooling of glassware molds |
| US6442976B1 (en) | 2000-02-24 | 2002-09-03 | Owens-Brockway Glass Container Inc. | Liquid cooling of glassware molds |
| US6668591B2 (en) * | 2001-07-17 | 2003-12-30 | Owens-Brockway Plastic Products Inc. | Liquid cooling of glassware molds |
| CN1290646C (zh) * | 2003-06-19 | 2006-12-20 | 北京铝镁泰和铸机设备科技有限公司 | 薄膜金属型结晶器和使用该结晶器铸造铸件的方法 |
| US20060150681A1 (en) * | 2005-01-13 | 2006-07-13 | Owens-Brockway Glass Container Inc. | Glassware molds with cooling arrangement |
| US20080314088A1 (en) * | 2005-11-25 | 2008-12-25 | Gerresheimer Glas Gmbh | Finish Cooling Apparatus for Container Glass Machines and Method for Cooling the Finish of a Glass Container During Preforming in a Container Glass Machine |
| US8127573B2 (en) * | 2006-04-04 | 2012-03-06 | Emhart Glass S.A. | Mold cooling system for I.S. machine |
| EP2484642B1 (fr) * | 2009-09-30 | 2020-09-02 | Nihon Yamamura Glass Co., Ltd. | Machine de moulage de produits en verre |
| CA2778085C (fr) * | 2009-10-20 | 2018-01-16 | Surface Generation Limited | Regulation par zones de la temperature d'un outil |
| MD4143B2 (en) * | 2010-04-14 | 2011-12-31 | Univ Tehnica Moldovei | Device for glassware moulding by vacuum suction method |
| ITMO20120072A1 (it) * | 2012-03-21 | 2013-09-22 | Ativa | Elemento maschio di stampo. |
| US9145322B2 (en) | 2012-10-19 | 2015-09-29 | Emhart Glass S.A. | Bi-axial cooling system and method |
| US9938178B2 (en) | 2013-08-15 | 2018-04-10 | Corning Incorporated | Methods of manufacturing glass articles using anisothermal temperature profiles |
| CN108473352B (zh) | 2015-12-15 | 2022-03-01 | Vitro可变资本股份有限公司 | 空心玻璃制品成形机的模具冷却系统和方法 |
| CN105948466A (zh) * | 2016-06-16 | 2016-09-21 | 苏州市灵通玻璃制品有限公司 | 一种大容量玻璃容器初型瓶坯冲压机构 |
| CN112321136A (zh) * | 2020-11-19 | 2021-02-05 | 成都市新西北光电有限公司 | 玻璃圆片软化成型系统及其操作方法 |
| CN114851513B (zh) * | 2022-05-05 | 2024-01-09 | 济南美腾机械设备有限公司 | 一种空心管成型装置 |
Family Cites Families (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1875202A (en) * | 1926-03-16 | 1932-08-30 | Aftergut Max | Automatic glass-blowing machine |
| US1798136A (en) * | 1926-06-03 | 1931-03-31 | Hartford Empire Co | Mold for shaping hollow glassware and method of controlling temperature thereof |
| US1789471A (en) * | 1928-06-04 | 1931-01-20 | Owens Illinois Glass Co | Machine for forming hollow glass articles |
| FR901241A (fr) * | 1943-03-29 | 1945-07-20 | Siemens Glas Ag | Perfectionnements aux procédés et dispositifs de refroidissement du moule de finissage dans les machine, à souffler le verre aspirantes ou refoulantes |
| US2508891A (en) * | 1946-05-04 | 1950-05-23 | Hartford Empire Co | Apparatus for forming glassware |
| US2751715A (en) * | 1954-07-30 | 1956-06-26 | Owens Illinois Glass Co | Mold cooling system |
| US3024571A (en) * | 1957-07-25 | 1962-03-13 | Owens Illinois Glass Co | Apparatus for molding glass |
| US3027685A (en) * | 1959-02-16 | 1962-04-03 | Owens Illinois Glass Co | Cooling apparatus for glass forming molds |
| US3191225A (en) * | 1962-10-30 | 1965-06-29 | American Can Co | Apparatus for control of material distrial in blow molded plastic articles |
| FR1320185A (fr) * | 1962-01-26 | 1963-03-08 | Verrerie Souchon Neuvesel Verr | Mode de refroidissement du moule de bague dans les machines de verrerie |
| US3314775A (en) * | 1963-07-23 | 1967-04-18 | Owens Illinois Inc | Cylinder mounting on i.s. type glassware forming machine |
| US3376123A (en) * | 1964-09-24 | 1968-04-02 | Ver Glasfabrieken Nv | Glass molding device |
| US3374079A (en) * | 1964-10-29 | 1968-03-19 | Maul Bros Inc | Apparatus for molding glass |
| US3499746A (en) * | 1966-06-01 | 1970-03-10 | Anchor Hocking Corp | Air and water cooling of glassware forming machines |
| US3653870A (en) * | 1970-03-09 | 1972-04-04 | Emhart Corp | Holding and cooling device for glassware molds |
| US3763293A (en) * | 1971-06-09 | 1973-10-02 | Bischoff Chemical Corp | Process of molding giant articles of structured plastic |
| BE788904A (fr) * | 1971-09-17 | 1973-03-15 | Siemens Ag | Dispositif pour determiner la temperature moyenne de la paroi interieure et le flux de chaleur moyen traversant la paroi d'un moule |
| BE789250A (fr) * | 1971-10-08 | 1973-01-15 | Heye Hermann | Procede et dispositif pour le refroidissement, par vaporisation, d'outils et de machines de l'industrie du verre ( |
| US3731650A (en) * | 1971-11-03 | 1973-05-08 | Gen Electric | Gas distributor for casting mold manufacture |
| US3834205A (en) * | 1972-12-20 | 1974-09-10 | Procter & Gamble | Selectively insulated mill roll |
| FR2264783B1 (fr) * | 1974-03-20 | 1978-08-04 | Boussois Souchon Neuvesel Sa | |
| US3888647A (en) * | 1974-04-15 | 1975-06-10 | Maul Bros Inc | Air cooled annular parison blank mold |
| JPS5347253B2 (fr) * | 1974-10-16 | 1978-12-20 |
-
1975
- 1975-08-20 DE DE2537037A patent/DE2537037C3/de not_active Expired
-
1976
- 1976-07-22 CH CH939776A patent/CH609955A5/xx not_active IP Right Cessation
- 1976-08-06 BE BE169658A patent/BE845000A/fr not_active IP Right Cessation
- 1976-08-11 IT IT69000/76A patent/IT1125209B/it active
- 1976-08-12 GB GB33639/76A patent/GB1533622A/en not_active Expired
- 1976-08-17 SU SU762387316A patent/SU904512A3/ru active
- 1976-08-18 IE IE1833/76A patent/IE44381B1/en not_active IP Right Cessation
- 1976-08-18 LU LU75614A patent/LU75614A1/xx unknown
- 1976-08-19 NL NLAANVRAGE7609218,A patent/NL174340C/xx not_active IP Right Cessation
- 1976-08-19 CS CS765393A patent/CS214873B2/cs unknown
- 1976-08-19 CA CA259,439A patent/CA1073212A/fr not_active Expired
- 1976-08-19 BR BR7605481A patent/BR7605481A/pt unknown
- 1976-08-19 ZA ZA764986A patent/ZA764986B/xx unknown
- 1976-08-19 FR FR7625169A patent/FR2321376A1/fr active Granted
- 1976-08-20 JP JP51099519A patent/JPS5225816A/ja active Granted
- 1976-08-20 DK DK378176A patent/DK150742C/da not_active IP Right Cessation
-
1979
- 1979-10-30 US US06/089,903 patent/US4251253A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5225816A (en) | 1977-02-26 |
| IE44381L (en) | 1977-02-20 |
| FR2321376A1 (fr) | 1977-03-18 |
| BE845000A (fr) | 1976-12-01 |
| LU75614A1 (fr) | 1977-03-29 |
| DE2537037B2 (de) | 1977-11-17 |
| BR7605481A (pt) | 1977-08-16 |
| JPS5511618B2 (fr) | 1980-03-26 |
| US4251253A (en) | 1981-02-17 |
| IE44381B1 (en) | 1981-11-04 |
| FR2321376B1 (fr) | 1981-03-20 |
| ZA764986B (en) | 1977-08-31 |
| DE2537037A1 (de) | 1977-02-24 |
| NL174340C (nl) | 1984-06-01 |
| CA1073212A (fr) | 1980-03-11 |
| DK150742B (da) | 1987-06-09 |
| DE2537037C3 (de) | 1978-07-13 |
| NL7609218A (nl) | 1977-02-22 |
| GB1533622A (en) | 1978-11-29 |
| DK378176A (da) | 1977-02-21 |
| DK150742C (da) | 1987-11-02 |
| IT1125209B (it) | 1986-05-14 |
| SU904512A3 (ru) | 1982-02-07 |
| CH609955A5 (fr) | 1979-03-30 |
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