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Priority to JP1986159653UpriorityCriticalpatent/JPH0441748Y2/ja
Priority to US07/249,174prioritypatent/US4978874A/en
Priority to KR1019880700690Aprioritypatent/KR910008540B1/ko
Priority to PCT/JP1987/000792prioritypatent/WO1988002946A1/ja
Publication of JPS6366078UpublicationCriticalpatent/JPS6366078U/ja
Priority to US07/403,520prioritypatent/US5019739A/en
Application grantedgrantedCritical
Publication of JPH0441748Y2publicationCriticalpatent/JPH0441748Y2/ja