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Priority to JP1987166814UpriorityCriticalpatent/JP2531706Y2/ja
Priority to DE3834061Aprioritypatent/DE3834061C2/de
Priority to KR1019880013245Aprioritypatent/KR970006031B1/ko
Priority to US07/255,268prioritypatent/US4891502A/en
Publication of JPH0172530UpublicationCriticalpatent/JPH0172530U/ja
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Publication of JP2531706Y2publicationCriticalpatent/JP2531706Y2/ja