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Priority to JP1987141236UpriorityCriticalpatent/JPH0727050Y2/ja
Priority to DE3807195Aprioritypatent/DE3807195A1/de
Priority to KR2019880007291Uprioritypatent/KR950001371Y1/ko
Publication of JPS6446115UpublicationCriticalpatent/JPS6446115U/ja
Priority to US07/430,928prioritypatent/US5017055A/en
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Publication of JPH0727050Y2publicationCriticalpatent/JPH0727050Y2/ja