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Priority to JP2497788UpriorityCriticalpatent/JPH0343236Y2/ja
Priority to US07/316,704prioritypatent/US4904365A/en
Priority to CA000592505Aprioritypatent/CA1333580C/en
Publication of JPH01129266UpublicationCriticalpatent/JPH01129266U/ja
Application grantedgrantedCritical
Publication of JPH0343236Y2publicationCriticalpatent/JPH0343236Y2/ja