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Priority to JP1988140286UpriorityCriticalpatent/JPH0647517Y2/ja
Priority to GB8924227Aprioritypatent/GB2224454B/en
Priority to US07/427,790prioritypatent/US4990117A/en
Publication of JPH0261399UpublicationCriticalpatent/JPH0261399U/ja
Priority to HK1014/93Aprioritypatent/HK101493A/xx
Application grantedgrantedCritical
Publication of JPH0647517Y2publicationCriticalpatent/JPH0647517Y2/ja