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Priority to JP19781387UpriorityCriticalpatent/JPH0620973Y2/ja
Priority to KR1019880015744Aprioritypatent/KR890010539A/ko
Priority to DE3841057Aprioritypatent/DE3841057A1/de
Priority to US07/280,921prioritypatent/US4912974A/en
Publication of JPH01102723UpublicationCriticalpatent/JPH01102723U/ja
Application grantedgrantedCritical
Publication of JPH0620973Y2publicationCriticalpatent/JPH0620973Y2/ja