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Priority to JP1987115965UpriorityCriticalpatent/JPS6421502U/ja
Priority to DE8888306822Tprioritypatent/DE3863505D1/de
Priority to EP88306822Aprioritypatent/EP0301789B1/en
Priority to US07/225,847prioritypatent/US4851797A/en
Priority to KR1019880009520Aprioritypatent/KR910003413B1/ko
Publication of JPS6421502UpublicationCriticalpatent/JPS6421502U/ja