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Priority to JP1988147294UpriorityCriticalpatent/JPH0266944U/ja
Priority to DE3934180Aprioritypatent/DE3934180C2/de
Priority to KR1019890015188Aprioritypatent/KR940004678B1/ko
Publication of JPH0266944UpublicationCriticalpatent/JPH0266944U/ja
Priority to US08/032,443prioritypatent/US5357716A/en