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Priority to JP1988120968UpriorityCriticalpatent/JPH0515129Y2/ja
Priority to CA000611295Aprioritypatent/CA1330097C/en
Priority to US07/407,509prioritypatent/US5052744A/en
Publication of JPH0241817UpublicationCriticalpatent/JPH0241817U/ja
Application grantedgrantedCritical
Publication of JPH0515129Y2publicationCriticalpatent/JPH0515129Y2/ja