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Priority to JP1989067169UpriorityCriticalpatent/JPH0742487Y2/ja
Priority to US07/509,842prioritypatent/US5144945A/en
Priority to CA002014897Aprioritypatent/CA2014897C/en
Publication of JPH037922UpublicationCriticalpatent/JPH037922U/ja
Application grantedgrantedCritical
Publication of JPH0742487Y2publicationCriticalpatent/JPH0742487Y2/ja