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Priority to JP15856881UpriorityCriticalpatent/JPS5865088U/ja
Priority to CA000389011Aprioritypatent/CA1174464A/en
Publication of JPS5865088UpublicationCriticalpatent/JPS5865088U/ja
Application grantedgrantedCritical
Publication of JPS6312381Y2publicationCriticalpatent/JPS6312381Y2/ja