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Application filedfiledCritical
Priority to JP4585684UpriorityCriticalpatent/JPS60156622U/ja
Priority to CA000477302Aprioritypatent/CA1270876A/en
Publication of JPS60156622UpublicationCriticalpatent/JPS60156622U/ja
Priority to US07/293,587prioritypatent/US4908485A/en
Priority to CA000615698Aprioritypatent/CA1290796C/en
Application grantedgrantedCritical
Publication of JPH0412577Y2publicationCriticalpatent/JPH0412577Y2/ja