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Priority to JP1987197729UpriorityCriticalpatent/JPH01100951U/ja
Priority to US07/230,383prioritypatent/US4939956A/en
Priority to DE3827152Aprioritypatent/DE3827152A1/de
Publication of JPH01100951UpublicationCriticalpatent/JPH01100951U/ja
Priority to US07/529,640prioritypatent/US5038635A/en