FR2474190B1 - Dispositif et procede de commande d'une machine comportant un outil d'usinage d'une piece - Google Patents
Dispositif et procede de commande d'une machine comportant un outil d'usinage d'une pieceInfo
- Publication number
- FR2474190B1 FR2474190B1 FR8023357A FR8023357A FR2474190B1 FR 2474190 B1 FR2474190 B1 FR 2474190B1 FR 8023357 A FR8023357 A FR 8023357A FR 8023357 A FR8023357 A FR 8023357A FR 2474190 B1 FR2474190 B1 FR 2474190B1
- Authority
- FR
- France
- Prior art keywords
- controlling
- machine
- workpiece tool
- workpiece
- tool
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/416—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control of velocity, acceleration or deceleration
- G05B19/4163—Adaptive control of feed or cutting velocity
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/34—Director, elements to supervisory
- G05B2219/34215—Microprocessor
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/34—Director, elements to supervisory
- G05B2219/34465—Safety, control of correct operation, abnormal states
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/34—Director, elements to supervisory
- G05B2219/34466—Bad circuits, watchdog, alarm, indication
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/37—Measurements
- G05B2219/37285—Load, current taken by motor
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/41—Servomotor, servo controller till figures
- G05B2219/41027—Control signal exponentially to error
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/43—Speed, acceleration, deceleration control ADC
- G05B2219/43152—Feed in, transfer line, rapid traverse to work, grip speed
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/43—Speed, acceleration, deceleration control ADC
- G05B2219/43158—Feedrate override
Landscapes
- Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Numerical Control (AREA)
- Automatic Control Of Machine Tools (AREA)
- Testing And Monitoring For Control Systems (AREA)
- Feedback Control In General (AREA)
- Control Of Electric Motors In General (AREA)
- Programmable Controllers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/089,436 US4279013A (en) | 1979-10-31 | 1979-10-31 | Machine process controller |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2474190A1 FR2474190A1 (fr) | 1981-07-24 |
FR2474190B1 true FR2474190B1 (fr) | 1985-10-04 |
Family
ID=22217635
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8023357A Expired FR2474190B1 (fr) | 1979-10-31 | 1980-10-31 | Dispositif et procede de commande d'une machine comportant un outil d'usinage d'une piece |
FR8115278A Expired FR2487538B1 (fr) | 1979-10-31 | 1981-08-06 | Procede et dispositif de commande adaptable d'une machine-outil automatisee d'usinage de pieces |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8115278A Expired FR2487538B1 (fr) | 1979-10-31 | 1981-08-06 | Procede et dispositif de commande adaptable d'une machine-outil automatisee d'usinage de pieces |
Country Status (9)
Country | Link |
---|---|
US (1) | US4279013A (fr) |
JP (1) | JPS5682909A (fr) |
BR (1) | BR8007024A (fr) |
CA (1) | CA1154522A (fr) |
DE (1) | DE3041133A1 (fr) |
FR (2) | FR2474190B1 (fr) |
GB (2) | GB2062296B (fr) |
IT (1) | IT1148280B (fr) |
SE (2) | SE449708B (fr) |
Families Citing this family (77)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4663721A (en) * | 1979-01-24 | 1987-05-05 | Power Engineering And Manufacturing, Ltd. | Gear cutter |
JPS6043266B2 (ja) * | 1979-11-12 | 1985-09-27 | ファナック株式会社 | 電動機駆動制御方式 |
DE3111425A1 (de) * | 1980-03-27 | 1982-02-18 | Kabushiki Kaisha Komatsu Seisakusho, Tokyo | Verfahren und vorrichtung zur ermittlung abnormaler stoergroessen beim betrieb einer werkzeugmaschine |
JPS5785674A (en) * | 1980-11-17 | 1982-05-28 | Komatsu Ltd | Copying corrector for welding robot |
US4402387A (en) * | 1981-07-21 | 1983-09-06 | Mitsubishi Denki Kabushiki Kaisha | Elevator control system |
HU185955B (en) * | 1981-09-14 | 1985-04-28 | Csepel Muevek Szerszamgepgyar | Method and connection arrangement for controlling the positioning for radial drilling machines |
DE3136433A1 (de) * | 1981-09-14 | 1983-03-31 | Klaus Prof. Dr.-Ing. 4006 Erkrath Brankamp | Verfahren zum feststellen und erkennen von abweichungen zyklisch wiederkehrender vorgaenge zum umformen von werkstuecken von einem normalverlauf |
JPS5854705U (ja) * | 1981-10-05 | 1983-04-14 | 株式会社山武 | 調節計 |
AU559847B2 (en) * | 1982-01-12 | 1987-03-19 | Mitsubishi Denki Kabushiki Kaisha | Numerical control machining system |
US4509126A (en) * | 1982-06-09 | 1985-04-02 | Amca International Corporation | Adaptive control for machine tools |
JPS6090655A (ja) * | 1983-05-23 | 1985-05-21 | Mitsubishi Electric Corp | 数値制御加工方法 |
US4540923A (en) * | 1984-05-14 | 1985-09-10 | General Motors Corporation | Adaptive servomotor controller |
GB8513772D0 (en) * | 1985-05-31 | 1985-07-03 | Coal Industry Patents Ltd | Resultant velocity control |
JPS6225422A (ja) * | 1985-07-25 | 1987-02-03 | Canon Inc | 半導体製造装置 |
US4707646A (en) * | 1986-05-29 | 1987-11-17 | Carrier Corporation | Method of limiting motor power output |
US4748554A (en) * | 1986-08-14 | 1988-05-31 | Gte Valeron Corporation | Machine monitoring system using motion detection for synchronization |
US4839819A (en) * | 1986-08-14 | 1989-06-13 | Cte Valeron Corporation | Intelligent power monitor |
JP2635332B2 (ja) * | 1987-09-14 | 1997-07-30 | ファナック 株式会社 | 機械加工におけるスピンドルモータと送り用サーボモータとの同期制御方法 |
JPH0195306A (ja) * | 1987-10-07 | 1989-04-13 | Fanuc Ltd | 非常停止制御回路 |
US4854786A (en) * | 1988-05-26 | 1989-08-08 | Allen-Bradley Company, Inc. | Computer controlled automatic shift drill |
US4949236A (en) * | 1988-08-08 | 1990-08-14 | United States As Represented By The Secretary Of The Air Force | Smart controller |
JPH0331906A (ja) * | 1989-06-29 | 1991-02-12 | Fanuc Ltd | 数値制御装置 |
CA2066743C (fr) * | 1989-10-02 | 2000-08-01 | Jogesh Warrior | Unite de commande montee sur place |
IT1243394B (it) * | 1990-11-27 | 1994-06-10 | Oima Spa | Pressa per lo stampaggio a iniezione di materie plastiche. |
US5730037A (en) * | 1995-04-17 | 1998-03-24 | Logan Clutch Corporation | Multi-spindle machine control systems |
US7949495B2 (en) | 1996-03-28 | 2011-05-24 | Rosemount, Inc. | Process variable transmitter with diagnostics |
US6907383B2 (en) | 1996-03-28 | 2005-06-14 | Rosemount Inc. | Flow diagnostic system |
US7254518B2 (en) | 1996-03-28 | 2007-08-07 | Rosemount Inc. | Pressure transmitter with diagnostics |
US7085610B2 (en) | 1996-03-28 | 2006-08-01 | Fisher-Rosemount Systems, Inc. | Root cause diagnostics |
US7623932B2 (en) | 1996-03-28 | 2009-11-24 | Fisher-Rosemount Systems, Inc. | Rule set for root cause diagnostics |
US6654697B1 (en) | 1996-03-28 | 2003-11-25 | Rosemount Inc. | Flow measurement with diagnostics |
US7630861B2 (en) | 1996-03-28 | 2009-12-08 | Rosemount Inc. | Dedicated process diagnostic device |
US6017143A (en) * | 1996-03-28 | 2000-01-25 | Rosemount Inc. | Device in a process system for detecting events |
US8290721B2 (en) | 1996-03-28 | 2012-10-16 | Rosemount Inc. | Flow measurement diagnostics |
US6539267B1 (en) | 1996-03-28 | 2003-03-25 | Rosemount Inc. | Device in a process system for determining statistical parameter |
US5793174A (en) * | 1996-09-06 | 1998-08-11 | Hunter Douglas Inc. | Electrically powered window covering assembly |
US6754601B1 (en) | 1996-11-07 | 2004-06-22 | Rosemount Inc. | Diagnostics for resistive elements of process devices |
US6601005B1 (en) | 1996-11-07 | 2003-07-29 | Rosemount Inc. | Process device diagnostics using process variable sensor signal |
US6519546B1 (en) | 1996-11-07 | 2003-02-11 | Rosemount Inc. | Auto correcting temperature transmitter with resistance based sensor |
CA2271563A1 (fr) * | 1999-05-13 | 2000-11-13 | Tet Hin Yeap | Machines a commande par ordinateur/commande numerique |
US6701274B1 (en) | 1999-08-27 | 2004-03-02 | Rosemount Inc. | Prediction of error magnitude in a pressure transmitter |
JP3435117B2 (ja) * | 2000-03-09 | 2003-08-11 | 義昭 垣野 | 加工制御システム |
US6772036B2 (en) | 2001-08-30 | 2004-08-03 | Fisher-Rosemount Systems, Inc. | Control system using process model |
JP4624351B2 (ja) | 2003-07-18 | 2011-02-02 | ローズマウント インコーポレイテッド | プロセス診断法 |
US7018800B2 (en) | 2003-08-07 | 2006-03-28 | Rosemount Inc. | Process device with quiescent current diagnostics |
US7627441B2 (en) | 2003-09-30 | 2009-12-01 | Rosemount Inc. | Process device with vibration based diagnostics |
US7523667B2 (en) | 2003-12-23 | 2009-04-28 | Rosemount Inc. | Diagnostics of impulse piping in an industrial process |
US6920799B1 (en) | 2004-04-15 | 2005-07-26 | Rosemount Inc. | Magnetic flow meter with reference electrode |
US7046180B2 (en) | 2004-04-21 | 2006-05-16 | Rosemount Inc. | Analog-to-digital converter with range error detection |
US7170732B2 (en) * | 2004-08-10 | 2007-01-30 | Micrel Incorporated | Surge delay for current limiter |
WO2006088032A2 (fr) * | 2005-02-17 | 2006-08-24 | Matsushita Electric Industrial Co., Ltd. | Procede de determination de conditions de montage, dispositif de determination de conditions de montage et appareil de montageprocede de determination de conditions de montage, dispositif de determination de conditions de montage et appareil de montage |
US8112565B2 (en) | 2005-06-08 | 2012-02-07 | Fisher-Rosemount Systems, Inc. | Multi-protocol field device interface with automatic bus detection |
US20070055414A1 (en) * | 2005-09-08 | 2007-03-08 | Darji Ankur K | Method and system for configuring telematics control unit |
US20070068225A1 (en) | 2005-09-29 | 2007-03-29 | Brown Gregory C | Leak detector for process valve |
AT503378B1 (de) * | 2006-01-19 | 2008-09-15 | Voest Alpine Bergtechnik | Verfahren zum regeln des antriebs einer vortriebs- oder gewinnungsmaschine |
DE102006037952A1 (de) * | 2006-08-12 | 2008-02-14 | Mtu Aero Engines Gmbh | Verfahren zur Überwachung eines Fertigungsverfahrens |
US7953501B2 (en) | 2006-09-25 | 2011-05-31 | Fisher-Rosemount Systems, Inc. | Industrial process control loop monitor |
US8788070B2 (en) | 2006-09-26 | 2014-07-22 | Rosemount Inc. | Automatic field device service adviser |
EP2074385B2 (fr) | 2006-09-29 | 2022-07-06 | Rosemount Inc. | Débitmètre électromagnétique équipé d'un moyen de vérification |
US7321846B1 (en) | 2006-10-05 | 2008-01-22 | Rosemount Inc. | Two-wire process control loop diagnostics |
FR2913132B1 (fr) * | 2007-02-22 | 2010-05-21 | Somfy Sas | Dispositif de commande radio, actionneur electrique et installation domotique comprenant un tel dispositif |
US8898036B2 (en) | 2007-08-06 | 2014-11-25 | Rosemount Inc. | Process variable transmitter with acceleration sensor |
US7590511B2 (en) | 2007-09-25 | 2009-09-15 | Rosemount Inc. | Field device for digital process control loop diagnostics |
US20100030348A1 (en) * | 2008-07-30 | 2010-02-04 | Jerry Gene Scherer | Method and system for integrated control of machine operations |
JP4643725B2 (ja) * | 2009-04-17 | 2011-03-02 | ファナック株式会社 | 工作機械の制御装置 |
JP4571225B1 (ja) * | 2009-05-27 | 2010-10-27 | ファナック株式会社 | 消費電力推定装置 |
DE102009054829A1 (de) * | 2009-12-17 | 2011-06-22 | Siemens Aktiengesellschaft, 80333 | Verfahren und Einrichtung zum Betrieb einer Maschine aus der Automatisierungstechnik |
JP4585613B1 (ja) * | 2010-01-29 | 2010-11-24 | 三菱重工業株式会社 | 消費電力制御システム |
DE102010010743B4 (de) | 2010-03-02 | 2019-10-24 | Wafios Ag | Umformmaschine zur Herstellung von Formteilen |
US9207670B2 (en) | 2011-03-21 | 2015-12-08 | Rosemount Inc. | Degrading sensor detection implemented within a transmitter |
EP2538296A1 (fr) * | 2011-06-21 | 2012-12-26 | Tornos SA | Accélération réelle d'une machine-outil |
WO2013008274A1 (fr) * | 2011-07-13 | 2013-01-17 | 三菱電機株式会社 | Appareil de commande numérique |
DE102011081547A1 (de) * | 2011-08-25 | 2013-02-28 | Siemens Aktiengesellschaft | Einstellung einer industriellen Anlage |
US9052240B2 (en) | 2012-06-29 | 2015-06-09 | Rosemount Inc. | Industrial process temperature transmitter with sensor stress diagnostics |
US9602122B2 (en) | 2012-09-28 | 2017-03-21 | Rosemount Inc. | Process variable measurement noise diagnostic |
TWI571716B (zh) * | 2015-10-27 | 2017-02-21 | 財團法人資訊工業策進會 | 診斷裝置及診斷方法 |
CN113006757B (zh) * | 2021-02-25 | 2022-12-20 | 三一石油智能装备有限公司 | 电驱压裂橇系统中辅助电机设备控制方法、装置及压裂橇 |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE874480C (de) * | 1944-09-16 | 1953-04-23 | Siemens Ag | Relaissteuerung zum Schutz des Werkzeugs von elektrisch angetriebenen Werkzeugmaschinen |
DE1602973B2 (de) * | 1967-11-28 | 1975-03-20 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Selbsttätige Steuerungsvorrichtu ng für Werkzeugmaschinen |
DE1948013A1 (de) * | 1969-09-23 | 1971-03-25 | Siemens Ag | Verfahren zur adaptiven Regelung von Drehmaschinen |
US3896360A (en) * | 1968-10-18 | 1975-07-22 | Siemens Ag | Method and apparatus for automatic forward feed programmed control of a machine tool |
CH516973A (de) * | 1968-10-18 | 1971-12-31 | Siemens Ag | Verfahren zur selbsttätigen Vorschubsteuerung von Drehmaschinen |
DE1954845B2 (de) * | 1969-10-31 | 1977-12-29 | Gildemeister Ag, 4800 Bielefeld | Vorrichtung zur optimalen anpassung einer numerisch gesteuerten werkzeugmaschine an den bearbeitungsvorgang eines werkstueckes |
CH512967A (de) * | 1970-02-02 | 1971-09-30 | Vilnjussky Exnii Metallorezhus | Verfahren zur Erzeugung eines Steuersignals zur Umschaltung der Vorschubgeschwindigkeit der Schleifscheibe einer Schleifmaschine vom Eilvorschub auf den Arbeitsvorschub |
US3665493A (en) * | 1970-03-30 | 1972-05-23 | Bendix Corp | Adaptive numerical control system for a machine tool |
US3720135A (en) * | 1971-02-01 | 1973-03-13 | Kearney & Trecker Corp | Feed rate controller |
DE2137853A1 (de) * | 1971-07-29 | 1973-02-08 | Elektro Projekt Mahler & Herrm | Vorrichtung zur steuerung von schrittmotoren |
JPS5235154B2 (fr) * | 1972-03-23 | 1977-09-07 | ||
US4031368A (en) * | 1972-04-17 | 1977-06-21 | Verkstadsteknik Ab | Adaptive control of cutting machining operations |
FR2183693B1 (fr) * | 1972-05-08 | 1976-05-21 | Ibm | |
US3849712A (en) * | 1972-06-30 | 1974-11-19 | Ibm | Adaptive numerically controlled machine tool responsive to deflection forces on the tool normal to the cutting path |
JPS5743384B2 (fr) * | 1972-11-30 | 1982-09-14 | ||
JPS5722702B2 (fr) * | 1973-12-11 | 1982-05-14 | ||
DE2643517A1 (de) * | 1976-09-28 | 1978-03-30 | Herfurth Gmbh | Regelkreis zum einsatz bei positionsantrieben hoher stellgenauigkeit |
JPS5824221B2 (ja) * | 1976-12-07 | 1983-05-19 | 株式会社新潟鐵工所 | 学習方式適応制御装置 |
US4136302A (en) * | 1977-01-10 | 1979-01-23 | Fellows Corporation | Control system for machine tool with hydraulically stroked cutter |
US4074467A (en) * | 1977-03-14 | 1978-02-21 | Cincinnati Milacron-Heald Corporation | Grinding machine control |
JPS5828639B2 (ja) * | 1977-04-13 | 1983-06-17 | 三菱電機株式会社 | 信号検知回路 |
GB1569653A (en) * | 1977-05-10 | 1980-06-18 | Loher Gmbh | Arrangements for controlling the speed of ac asynchronous motors |
JPS5467181A (en) * | 1977-11-07 | 1979-05-30 | Fuji Xerox Co Ltd | Method of preventing false operation of controller |
US4208718A (en) * | 1978-06-05 | 1980-06-17 | Kearney & Trecker Corporation | Method of optimizing the operation of a computer controlled machine tool |
-
1979
- 1979-10-31 US US06/089,436 patent/US4279013A/en not_active Expired - Lifetime
-
1980
- 1980-10-28 GB GB8034664A patent/GB2062296B/en not_active Expired
- 1980-10-29 IT IT50038/80A patent/IT1148280B/it active
- 1980-10-29 CA CA000363494A patent/CA1154522A/fr not_active Expired
- 1980-10-30 BR BR8007024A patent/BR8007024A/pt unknown
- 1980-10-30 SE SE8007620A patent/SE449708B/sv not_active IP Right Cessation
- 1980-10-31 FR FR8023357A patent/FR2474190B1/fr not_active Expired
- 1980-10-31 JP JP15369380A patent/JPS5682909A/ja active Granted
- 1980-10-31 DE DE19803041133 patent/DE3041133A1/de active Granted
-
1981
- 1981-08-06 FR FR8115278A patent/FR2487538B1/fr not_active Expired
-
1983
- 1983-02-03 GB GB08302916A patent/GB2118737B/en not_active Expired
-
1986
- 1986-12-19 SE SE8605487A patent/SE466588B/sv not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
FR2487538B1 (fr) | 1985-11-15 |
IT8050038A0 (it) | 1980-10-29 |
GB2118737A (en) | 1983-11-02 |
JPS5682909A (en) | 1981-07-07 |
CA1154522A (fr) | 1983-09-27 |
SE8605487D0 (sv) | 1986-12-19 |
FR2474190A1 (fr) | 1981-07-24 |
SE8605487L (sv) | 1986-12-19 |
BR8007024A (pt) | 1981-05-05 |
DE3041133A1 (de) | 1981-06-19 |
IT1148280B (it) | 1986-11-26 |
FR2487538A1 (fr) | 1982-01-29 |
GB2118737B (en) | 1984-05-10 |
SE466588B (sv) | 1992-03-09 |
GB2062296B (en) | 1984-05-31 |
SE8007620L (sv) | 1981-05-01 |
US4279013A (en) | 1981-07-14 |
DE3041133C2 (fr) | 1988-08-18 |
GB2062296A (en) | 1981-05-20 |
GB8302916D0 (en) | 1983-03-09 |
JPH0413723B2 (fr) | 1992-03-10 |
SE449708B (sv) | 1987-05-18 |
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