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Priority to JP1988076289UpriorityCriticalpatent/JPH01179272U/ja
Priority to DE3918780Aprioritypatent/DE3918780C2/de
Priority to US07/364,043prioritypatent/US4959993A/en
Priority to KR1019890007910Aprioritypatent/KR920009019B1/ko
Publication of JPH01179272UpublicationCriticalpatent/JPH01179272U/ja