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Priority to JP953381UpriorityCriticalpatent/JPS57123253U/ja
Priority to EP81302692Aprioritypatent/EP0042293B1/en
Priority to EP84111360Aprioritypatent/EP0139238B1/en
Priority to DE8181302692Tprioritypatent/DE3174800D1/de
Priority to DE8484111360Tprioritypatent/DE3176516D1/de
Priority to US06/274,322prioritypatent/US4456393A/en
Publication of JPS57123253UpublicationCriticalpatent/JPS57123253U/ja