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Priority to JP1980075151UpriorityCriticalpatent/JPS5819753Y2/ja
Priority to US06/268,891prioritypatent/US4392170A/en
Priority to EP81104222Aprioritypatent/EP0041270B1/en
Priority to DE8181104222Tprioritypatent/DE3160266D1/de
Publication of JPS57883UpublicationCriticalpatent/JPS57883U/ja
Application grantedgrantedCritical
Publication of JPS5819753Y2publicationCriticalpatent/JPS5819753Y2/ja