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Priority to JP1987119803UpriorityCriticalpatent/JPH0420461Y2/ja
Priority to US07/228,865prioritypatent/US5055340A/en
Publication of JPS6426059UpublicationCriticalpatent/JPS6426059U/ja
Application grantedgrantedCritical
Publication of JPH0420461Y2publicationCriticalpatent/JPH0420461Y2/ja
