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Priority to JP2143281UpriorityCriticalpatent/JPS6229271Y2/ja
Priority to DE19813112869prioritypatent/DE3112869A1/de
Publication of JPS57136786UpublicationCriticalpatent/JPS57136786U/ja
Priority to US06/525,798prioritypatent/US4504163A/en
Application grantedgrantedCritical
Publication of JPS6229271Y2publicationCriticalpatent/JPS6229271Y2/ja