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Priority claimed from JP62136386Aexternal-prioritypatent/JPS63145969A/ja
Application filed by Japan Engine Valve MfgfiledCriticalJapan Engine Valve Mfg
Priority claimed from EP87306566Aexternal-prioritypatent/EP0255772B1/de
Application grantedgrantedCritical
Publication of ATE86752T1publicationCriticalpatent/ATE86752T1/de