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Application filedfiledCritical
Priority to JP13263572UpriorityCriticalpatent/JPS513072Y2/ja
Priority to GB5219673Aprioritypatent/GB1397889A/en
Publication of JPS4987550UpublicationCriticalpatent/JPS4987550U/ja
Application grantedgrantedCritical
Publication of JPS513072Y2publicationCriticalpatent/JPS513072Y2/ja
Priority to US05/835,300prioritypatent/US4173252A/en
