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Priority to JP2851788UpriorityCriticalpatent/JPH01131037U/ja
Priority to CA 591667prioritypatent/CA1323979C/en
Priority to GB8904192Aprioritypatent/GB2216066B/en
Priority to DE19893905627prioritypatent/DE3905627A1/de
Publication of JPH01131037UpublicationCriticalpatent/JPH01131037U/ja