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Priority to JP1987142020UpriorityCriticalpatent/JPH0529419Y2/ja
Priority to US07/242,742prioritypatent/US4995623A/en
Publication of JPS6446575UpublicationCriticalpatent/JPS6446575U/ja
Application grantedgrantedCritical
Publication of JPH0529419Y2publicationCriticalpatent/JPH0529419Y2/ja
