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Priority to JP4224285UpriorityCriticalpatent/JPH0220549Y2/ja
Priority to US06/825,978prioritypatent/US4671600A/en
Priority to GB08603268Aprioritypatent/GB2172757B/en
Priority to DE19863605950prioritypatent/DE3605950A1/de
Publication of JPS61157765UpublicationCriticalpatent/JPS61157765U/ja
Application grantedgrantedCritical
Publication of JPH0220549Y2publicationCriticalpatent/JPH0220549Y2/ja