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Priority to JP1987140655UpriorityCriticalpatent/JPH0531087Y2/ja
Priority to US07/242,976prioritypatent/US4895231A/en
Priority to EP88115035Aprioritypatent/EP0307892B1/en
Priority to DE3889821Tprioritypatent/DE3889821T2/de
Publication of JPS6446830UpublicationCriticalpatent/JPS6446830U/ja
Application grantedgrantedCritical
Publication of JPH0531087Y2publicationCriticalpatent/JPH0531087Y2/ja