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Priority to JP15471287UpriorityCriticalpatent/JPH0161770U/ja
Priority to DE8888309120Tprioritypatent/DE3876364T2/de
Priority to KR1019880012810Aprioritypatent/KR890007200A/ko
Priority to EP88309120Aprioritypatent/EP0310429B1/en
Publication of JPH0161770UpublicationCriticalpatent/JPH0161770U/ja
Priority to US07/490,544prioritypatent/US5052538A/en