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Priority to JP1989129673UpriorityCriticalpatent/JPH0630353Y2/ja
Priority to CA002012165Aprioritypatent/CA2012165C/en
Priority to US07/517,798prioritypatent/US5160011A/en
Priority to GB9010571Aprioritypatent/GB2231320B/en
Publication of JPH0368746UpublicationCriticalpatent/JPH0368746U/ja
Application grantedgrantedCritical
Publication of JPH0630353Y2publicationCriticalpatent/JPH0630353Y2/ja