FR2377265A1 - Procede de soudage par ultrasons - Google Patents
Procede de soudage par ultrasonsInfo
- Publication number
- FR2377265A1 FR2377265A1 FR7801228A FR7801228A FR2377265A1 FR 2377265 A1 FR2377265 A1 FR 2377265A1 FR 7801228 A FR7801228 A FR 7801228A FR 7801228 A FR7801228 A FR 7801228A FR 2377265 A1 FR2377265 A1 FR 2377265A1
- Authority
- FR
- France
- Prior art keywords
- welding process
- ultrasonic welding
- assembled
- engagement
- ultrasound
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title abstract 2
- 238000003466 welding Methods 0.000 title 1
- 238000002604 ultrasonography Methods 0.000 abstract 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/72—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by combined operations or combined techniques, e.g. welding and stitching
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
- B29C65/7855—Provisory fixing
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/114—Single butt joints
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/816—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/8161—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps said pressing elements being supported or backed-up by springs or by resilient 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
- B29C65/58—Snap connection
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
- B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
- B29C66/1312—Single flange to flange joints, the parts to be joined being rigid
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/302—Particular design of joint configurations the area to be joined comprising melt initiators
- B29C66/3022—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined
- B29C66/30223—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined said melt initiators being rib-like
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
- B29C66/541—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles a substantially flat extra element being placed between and clamped by the joined hollow-preforms
- B29C66/5412—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles a substantially flat extra element being placed between and clamped by the joined hollow-preforms said substantially flat extra element being flexible, e.g. a membrane
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/748—Machines or parts thereof not otherwise provided for
- B29L2031/7496—Pumps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/748—Machines or parts thereof not otherwise provided for
- B29L2031/7506—Valves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Valve Housings (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP373377A JPS5388883A (en) | 1977-01-17 | 1977-01-17 | Supersonic welding method |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2377265A1 true FR2377265A1 (fr) | 1978-08-11 |
Family
ID=11565443
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7801228A Pending FR2377265A1 (fr) | 1977-01-17 | 1978-01-17 | Procede de soudage par ultrasons |
Country Status (9)
Country | Link |
---|---|
JP (1) | JPS5388883A (enrdf_load_stackoverflow) |
AU (1) | AU509518B2 (enrdf_load_stackoverflow) |
BE (1) | BE862833A (enrdf_load_stackoverflow) |
BR (1) | BR7800238A (enrdf_load_stackoverflow) |
DE (1) | DE2801699A1 (enrdf_load_stackoverflow) |
FR (1) | FR2377265A1 (enrdf_load_stackoverflow) |
GB (1) | GB1566531A (enrdf_load_stackoverflow) |
IT (1) | IT7819311A0 (enrdf_load_stackoverflow) |
NL (1) | NL7800553A (enrdf_load_stackoverflow) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2506647A1 (fr) * | 1981-05-27 | 1982-12-03 | Lucas Industries Ltd | Procede de fabrication d'un ensemble forme d'un tube de metal et d'un corps entourant celui-ci |
EP0064737A3 (de) * | 1981-05-13 | 1983-08-24 | Compur-Electronic GmbH | Ultraschallschweiss-Verfahren und -Vorrichtung |
FR2577164A1 (fr) * | 1985-02-12 | 1986-08-14 | Flonic Sa | Procede de realisation de membranes synthetiques pour compteur a gaz et compteur a gaz comportant une membrane obtenue par la mise en oeuvre dudit procede |
FR2656824A1 (fr) * | 1990-01-10 | 1991-07-12 | Plastic Omnium Cie | Procede d'assemblage de pieces plastiques et pieces destinees a etre assemblees. |
EP0695625A1 (fr) * | 1994-08-01 | 1996-02-07 | Société dite: LIR FRANCE(S.A.) | Pièce en résine synthétique en deux parties et son procédé de fabrication |
EP2607760A3 (de) * | 2011-12-20 | 2017-01-11 | GEZE GmbH | Ventil für einen Antrieb einer Tür oder eines Fensters oder dergleichen sowie ein Verfahren zum Fügen des Ventils |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2120598B (en) * | 1982-05-24 | 1986-04-16 | Kangol Magnet Ltd | Encapsulating seat belt buckle |
JPS5954516A (ja) * | 1982-09-21 | 1984-03-29 | Fujimori Kogyo Kk | シ−トの接続方法 |
GB2134847B (en) * | 1983-02-04 | 1985-11-13 | Standard Telephones Cables Ltd | Assembly using ultrasonics |
JPS6241525U (enrdf_load_stackoverflow) * | 1985-08-29 | 1987-03-12 | ||
JPH01134168A (ja) * | 1987-11-18 | 1989-05-26 | Sanyo Electric Co Ltd | 冷凍装置 |
GB2253263B (en) * | 1991-03-01 | 1994-06-15 | Linemann Halflo Ltd | Non-return valve assembly |
DE10252976A1 (de) * | 2002-11-14 | 2004-05-27 | Nexans | Verfahren zur Extrusion eines Gemisches |
CN201363474Y (zh) * | 2009-02-20 | 2009-12-16 | 厦门科际精密器材有限公司 | 一种结构改进的电磁线性阀 |
CN102052497B (zh) * | 2009-10-29 | 2013-03-13 | 浙江三花制冷集团有限公司 | 切换阀端盖的制造方法、切换阀端盖及切换阀 |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1171383A (fr) * | 1957-01-08 | 1959-01-26 | Procédé d'assemblage de feuilles ou éléments en matière plastique et produit industriel nouveau en résultant | |
DE1086426B (de) * | 1955-09-09 | 1960-08-04 | Mannesmann Ag | Verfahren zum Verschweissen von ineinandergreifenden Formteilen aus thermoplastischem Kunststoff |
NL6412575A (enrdf_load_stackoverflow) * | 1964-10-29 | 1966-05-02 | ||
US3277830A (en) * | 1964-11-02 | 1966-10-11 | Acf Ind Inc | Valved pump |
US3514299A (en) * | 1967-12-08 | 1970-05-26 | Pantasote Co Of New York Inc T | Packaging method |
DE7147249U (de) * | 1972-05-18 | Vdo Schindling A Gmbh | Unterdrucksteuerelement | |
FR2135058A1 (en) * | 1971-05-04 | 1972-12-15 | Aerospatiale | Partially transparent structures - of polycarbonate film over a lightweight abs frame |
US3963814A (en) * | 1970-02-06 | 1976-06-15 | Cebal Gp | Method for hermetically sealing a rigid panel |
DE2502673A1 (de) * | 1975-01-23 | 1976-07-29 | Kayser Kg Industrietechnik A | Unterdrucksteuerelement |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5218055B2 (enrdf_load_stackoverflow) * | 1972-07-31 | 1977-05-19 | ||
JPS5921772B2 (ja) * | 1976-05-04 | 1984-05-22 | アイシン精機株式会社 | 二部材の超音波溶着方法 |
-
1977
- 1977-01-17 JP JP373377A patent/JPS5388883A/ja active Granted
- 1977-12-30 AU AU32109/77A patent/AU509518B2/en not_active Expired
-
1978
- 1978-01-12 BE BE2056597A patent/BE862833A/xx unknown
- 1978-01-16 GB GB1670/78A patent/GB1566531A/en not_active Expired
- 1978-01-16 BR BR7800238A patent/BR7800238A/pt unknown
- 1978-01-16 DE DE19782801699 patent/DE2801699A1/de not_active Withdrawn
- 1978-01-17 IT IT7819311A patent/IT7819311A0/it unknown
- 1978-01-17 NL NL7800553A patent/NL7800553A/xx not_active Application Discontinuation
- 1978-01-17 FR FR7801228A patent/FR2377265A1/fr active Pending
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE7147249U (de) * | 1972-05-18 | Vdo Schindling A Gmbh | Unterdrucksteuerelement | |
DE1086426B (de) * | 1955-09-09 | 1960-08-04 | Mannesmann Ag | Verfahren zum Verschweissen von ineinandergreifenden Formteilen aus thermoplastischem Kunststoff |
FR1171383A (fr) * | 1957-01-08 | 1959-01-26 | Procédé d'assemblage de feuilles ou éléments en matière plastique et produit industriel nouveau en résultant | |
NL6412575A (enrdf_load_stackoverflow) * | 1964-10-29 | 1966-05-02 | ||
US3277830A (en) * | 1964-11-02 | 1966-10-11 | Acf Ind Inc | Valved pump |
US3514299A (en) * | 1967-12-08 | 1970-05-26 | Pantasote Co Of New York Inc T | Packaging method |
US3963814A (en) * | 1970-02-06 | 1976-06-15 | Cebal Gp | Method for hermetically sealing a rigid panel |
FR2135058A1 (en) * | 1971-05-04 | 1972-12-15 | Aerospatiale | Partially transparent structures - of polycarbonate film over a lightweight abs frame |
DE2502673A1 (de) * | 1975-01-23 | 1976-07-29 | Kayser Kg Industrietechnik A | Unterdrucksteuerelement |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0064737A3 (de) * | 1981-05-13 | 1983-08-24 | Compur-Electronic GmbH | Ultraschallschweiss-Verfahren und -Vorrichtung |
FR2506647A1 (fr) * | 1981-05-27 | 1982-12-03 | Lucas Industries Ltd | Procede de fabrication d'un ensemble forme d'un tube de metal et d'un corps entourant celui-ci |
FR2577164A1 (fr) * | 1985-02-12 | 1986-08-14 | Flonic Sa | Procede de realisation de membranes synthetiques pour compteur a gaz et compteur a gaz comportant une membrane obtenue par la mise en oeuvre dudit procede |
EP0192555A1 (fr) * | 1985-02-12 | 1986-08-27 | Schlumberger Industries | Procédé de réalisation de membranes synthétiques pour compteur à gaz et compteur à gaz comportant une membrane obtenue par la mise en oeuvre dudit procédé |
FR2656824A1 (fr) * | 1990-01-10 | 1991-07-12 | Plastic Omnium Cie | Procede d'assemblage de pieces plastiques et pieces destinees a etre assemblees. |
EP0695625A1 (fr) * | 1994-08-01 | 1996-02-07 | Société dite: LIR FRANCE(S.A.) | Pièce en résine synthétique en deux parties et son procédé de fabrication |
EP2607760A3 (de) * | 2011-12-20 | 2017-01-11 | GEZE GmbH | Ventil für einen Antrieb einer Tür oder eines Fensters oder dergleichen sowie ein Verfahren zum Fügen des Ventils |
Also Published As
Publication number | Publication date |
---|---|
DE2801699A1 (de) | 1978-07-20 |
IT7819311A0 (it) | 1978-01-17 |
AU3210977A (en) | 1979-07-19 |
BE862833A (fr) | 1978-05-02 |
GB1566531A (en) | 1980-04-30 |
JPS622973B2 (enrdf_load_stackoverflow) | 1987-01-22 |
JPS5388883A (en) | 1978-08-04 |
AU509518B2 (en) | 1980-05-15 |
NL7800553A (nl) | 1978-07-19 |
BR7800238A (pt) | 1978-09-05 |
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