DD201812A5 - Verfahren zum abscheiden von metallschichten auf den waenden von kokillen - Google Patents
Verfahren zum abscheiden von metallschichten auf den waenden von kokillen Download PDFInfo
- Publication number
- DD201812A5 DD201812A5 DD81234026A DD23402681A DD201812A5 DD 201812 A5 DD201812 A5 DD 201812A5 DD 81234026 A DD81234026 A DD 81234026A DD 23402681 A DD23402681 A DD 23402681A DD 201812 A5 DD201812 A5 DD 201812A5
- Authority
- DD
- German Democratic Republic
- Prior art keywords
- solution
- deposition
- temperature
- mold wall
- bath
- Prior art date
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 10
- 239000002184 metal Substances 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 title claims description 14
- 238000000151 deposition Methods 0.000 claims abstract description 30
- 230000008021 deposition Effects 0.000 claims abstract description 28
- 239000002245 particle Substances 0.000 claims abstract description 22
- 238000009749 continuous casting Methods 0.000 claims abstract description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 229910052759 nickel Inorganic materials 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 150000002815 nickel Chemical class 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 9
- 238000004070 electrodeposition Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 15
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 9
- 229910010271 silicon carbide Inorganic materials 0.000 description 9
- 238000000576 coating method Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 3
- KWSLGOVYXMQPPX-UHFFFAOYSA-N 5-[3-(trifluoromethyl)phenyl]-2h-tetrazole Chemical compound FC(F)(F)C1=CC=CC(C2=NNN=N2)=C1 KWSLGOVYXMQPPX-UHFFFAOYSA-N 0.000 description 2
- 241000080590 Niso Species 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 description 2
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 229910001379 sodium hypophosphite Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 235000013490 limbo Nutrition 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000002347 wear-protection layer Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D15/00—Electrolytic or electrophoretic production of coatings containing embedded materials, e.g. particles, whiskers, wires
- C25D15/02—Combined electrolytic and electrophoretic processes with charged materials
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1603—Process or apparatus coating on selected surface areas
- C23C18/1614—Process or apparatus coating on selected surface areas plating on one side
- C23C18/1616—Process or apparatus coating on selected surface areas plating on one side interior or inner surface
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1633—Process of electroless plating
- C23C18/1655—Process features
- C23C18/1662—Use of incorporated material in the solution or dispersion, e.g. particles, whiskers, wires
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/1803—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces
- C23C18/1806—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces by mechanical pretreatment, e.g. grinding, sanding
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/1803—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces
- C23C18/1824—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces by chemical pretreatment
- C23C18/1827—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces by chemical pretreatment only one step pretreatment
- C23C18/1831—Use of metal, e.g. activation, sensitisation with noble metals
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/31—Coating with metals
- C23C18/32—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron
- C23C18/34—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron using reducing agents
- C23C18/36—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron using reducing agents using hypophosphites
Landscapes
- Chemical & Material Sciences (AREA)
- Metallurgy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Dispersion Chemistry (AREA)
- Electroplating Methods And Accessories (AREA)
- Continuous Casting (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Chemically Coating (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19803038289 DE3038289A1 (de) | 1980-10-10 | 1980-10-10 | Verfahren zum abscheiden von metallschichten auf den waenden von kokillen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DD201812A5 true DD201812A5 (de) | 1983-08-10 |
Family
ID=6114074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DD81234026A DD201812A5 (de) | 1980-10-10 | 1981-10-12 | Verfahren zum abscheiden von metallschichten auf den waenden von kokillen |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US4404232A (es) |
| JP (1) | JPS57126997A (es) |
| BE (1) | BE890693A (es) |
| CA (1) | CA1173307A (es) |
| DD (1) | DD201812A5 (es) |
| DE (1) | DE3038289A1 (es) |
| ES (1) | ES8305854A1 (es) |
| FR (1) | FR2491791A1 (es) |
| GB (1) | GB2086435A (es) |
| IT (1) | IT1167513B (es) |
| LU (1) | LU83676A1 (es) |
| NL (1) | NL8104621A (es) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3313503A1 (de) * | 1983-04-14 | 1984-10-18 | Evertz, Egon, 5650 Solingen | Einteilige durchlaufstranggiesskokille und verfahren zu ihrer herstellung |
| US4533568A (en) * | 1983-08-24 | 1985-08-06 | The Burns & Russell Company | Method of preparing a patterned mold surface |
| DE3336373A1 (de) * | 1983-10-06 | 1985-04-25 | Egon 5650 Solingen Evertz | Kokille fuer das stranggiessen von stahl und verfahren zu ihrer herstellung |
| JPS6137999A (ja) * | 1984-07-28 | 1986-02-22 | Kanai Hiroyuki | 紡機用リング |
| US4669529A (en) * | 1984-12-03 | 1987-06-02 | Egon Evertz | Continuous casting mould |
| FI75748C (fi) * | 1986-08-15 | 1988-08-08 | Outokumpu Oy | Kokill. |
| US4802436A (en) * | 1987-07-21 | 1989-02-07 | Williams Gold Refining Company | Continuous casting furnace and die system of modular design |
| US5074970A (en) * | 1989-07-03 | 1991-12-24 | Kostas Routsis | Method for applying an abrasive layer to titanium alloy compressor airfoils |
| US5516591A (en) * | 1992-11-13 | 1996-05-14 | Feldstein; Nathan | Composite plated articles having light-emitting properties |
| US5514479A (en) * | 1995-06-05 | 1996-05-07 | Feldstein; Nathan | Functional coatings comprising light emitting particles |
| FR2750903B1 (fr) * | 1996-07-11 | 1998-09-18 | Usinor Sacilor | Element d'une lingotiere pour la coulee continue des metaux, comprenant une paroi refroidie en cuivre ou en alliage de cuivre comportant sur sa surface externe un revetement metallique et procede pour son revetement |
| RU2138583C1 (ru) * | 1998-06-01 | 1999-09-27 | Открытое акционерное общество "Завод им.В.А.Дегтярева" | Способ осаждения композиционных электрохимических покрытий |
| US5939135A (en) * | 1998-06-17 | 1999-08-17 | Wu; Ming-Te | General type press forming knife-mould made of plain, soft and thin material |
| DE10227034A1 (de) * | 2002-06-17 | 2003-12-24 | Km Europa Metal Ag | Kupfer-Gießform |
| US20040051026A1 (en) * | 2002-09-18 | 2004-03-18 | Flynn Robert William | Mold core coating |
| DE102005040151B4 (de) * | 2005-08-25 | 2008-10-09 | Galvotech Dier Gmbh | Verfahren zur galvanischen Abscheidung von Metallschichten und mit dem Verfahren hergestellte Kokillenplatte |
| DE202009013126U1 (de) | 2009-09-29 | 2009-12-10 | Egon Evertz Kg (Gmbh & Co.) | Kokille zum Stranggießen |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3753667A (en) * | 1968-01-16 | 1973-08-21 | Gen Am Transport | Articles having electroless metal coatings incorporating wear-resisting particles therein |
| US4037646A (en) * | 1975-06-13 | 1977-07-26 | Sumitomo Metal Industries, Ltd. | Molds for continuously casting steel |
| DE2634633C2 (de) * | 1976-07-31 | 1984-07-05 | Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover | Stranggießkokille aus einem Kupferwerkstoff, insbesondere zum Stranggießen von Stahl |
| JPS589147B2 (ja) * | 1980-02-04 | 1983-02-19 | 関東化成工業株式会社 | 無電解複合めつき方法 |
-
1980
- 1980-10-10 DE DE19803038289 patent/DE3038289A1/de not_active Withdrawn
-
1981
- 1981-10-06 US US06/309,170 patent/US4404232A/en not_active Expired - Lifetime
- 1981-10-06 LU LU83676A patent/LU83676A1/de unknown
- 1981-10-09 IT IT24413/81A patent/IT1167513B/it active
- 1981-10-09 CA CA000387676A patent/CA1173307A/en not_active Expired
- 1981-10-09 GB GB8130605A patent/GB2086435A/en not_active Withdrawn
- 1981-10-09 JP JP56160355A patent/JPS57126997A/ja active Pending
- 1981-10-09 BE BE6/47535A patent/BE890693A/fr unknown
- 1981-10-09 NL NL8104621A patent/NL8104621A/nl not_active Application Discontinuation
- 1981-10-09 ES ES506171A patent/ES8305854A1/es not_active Expired
- 1981-10-12 FR FR8119171A patent/FR2491791A1/fr not_active Withdrawn
- 1981-10-12 DD DD81234026A patent/DD201812A5/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57126997A (en) | 1982-08-06 |
| ES506171A0 (es) | 1983-04-16 |
| IT8124413A0 (it) | 1981-10-09 |
| ES8305854A1 (es) | 1983-04-16 |
| DE3038289A1 (de) | 1982-05-27 |
| US4404232A (en) | 1983-09-13 |
| BE890693A (fr) | 1982-02-01 |
| NL8104621A (nl) | 1982-05-03 |
| GB2086435A (en) | 1982-05-12 |
| IT1167513B (it) | 1987-05-13 |
| LU83676A1 (de) | 1982-02-18 |
| CA1173307A (en) | 1984-08-28 |
| FR2491791A1 (fr) | 1982-04-16 |
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