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Priority to JP6668989UpriorityCriticalpatent/JPH0725686Y2/ja
Priority to KR1019890016581Aprioritypatent/KR920004533B1/ko
Priority to DE3938056Aprioritypatent/DE3938056C2/de
Publication of JPH036558UpublicationCriticalpatent/JPH036558U/ja
Priority to US07/815,582prioritypatent/US5271816A/en
Application grantedgrantedCritical
Publication of JPH0725686Y2publicationCriticalpatent/JPH0725686Y2/ja