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Priority to JP1987117330UpriorityCriticalpatent/JPH0642148Y2/ja
Priority to US07/221,416prioritypatent/US4928730A/en
Priority to DE19883825935prioritypatent/DE3825935A1/de
Publication of JPS6421875UpublicationCriticalpatent/JPS6421875U/ja
Application grantedgrantedCritical
Publication of JPH0642148Y2publicationCriticalpatent/JPH0642148Y2/ja
