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Priority to JP7658181UpriorityCriticalpatent/JPH0311947Y2/ja
Priority to US06/379,545prioritypatent/US4501165A/en
Priority to DE3218813Aprioritypatent/DE3218813A1/de
Publication of JPS57191128UpublicationCriticalpatent/JPS57191128U/ja
Application grantedgrantedCritical
Publication of JPH0311947Y2publicationCriticalpatent/JPH0311947Y2/ja