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Priority to JP5577473UpriorityCriticalpatent/JPS538971Y2/ja
Priority to GB1776374Aprioritypatent/GB1450838A/en
Priority to DE19742422837prioritypatent/DE2422837C3/de
Priority to US468867Aprioritypatent/US3924450A/en
Publication of JPS505921UpublicationCriticalpatent/JPS505921U/ja
Application grantedgrantedCritical
Publication of JPS538971Y2publicationCriticalpatent/JPS538971Y2/ja