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Priority to JP1987079844UpriorityCriticalpatent/JPH0611904Y2/ja
Priority to DE3809185Aprioritypatent/DE3809185C2/de
Priority to US07/169,902prioritypatent/US4898419A/en
Priority to CA000561894Aprioritypatent/CA1294647C/en
Publication of JPS63189787UpublicationCriticalpatent/JPS63189787U/ja
Application grantedgrantedCritical
Publication of JPH0611904Y2publicationCriticalpatent/JPH0611904Y2/ja