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Priority to JP1985019664UpriorityCriticalpatent/JPH053380Y2/ja
Priority to US06/829,767prioritypatent/US4746145A/en
Priority to CA000501840Aprioritypatent/CA1279884C/en
Publication of JPS61135730UpublicationCriticalpatent/JPS61135730U/ja
Application grantedgrantedCritical
Publication of JPH053380Y2publicationCriticalpatent/JPH053380Y2/ja
