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Application filedfiledCritical
Priority to JP1980177548UpriorityCriticalpatent/JPS6235195Y2/ja
Priority to CA000390242Aprioritypatent/CA1162488A/en
Priority to AT81305574Tprioritypatent/ATE26356T1/de
Priority to DE8181305574Tprioritypatent/DE3176074D1/de
Priority to EP81305574Aprioritypatent/EP0053475B1/en
Priority to KR1019810004623Aprioritypatent/KR880000343B1/ko
Publication of JPS57102002UpublicationCriticalpatent/JPS57102002U/ja
Priority to US06/548,031prioritypatent/US4464743A/en
Application grantedgrantedCritical
Publication of JPS6235195Y2publicationCriticalpatent/JPS6235195Y2/ja