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Priority claimed from JP12453585Uexternal-prioritypatent/JPS6233300U/ja
Priority claimed from JP15122385Uexternal-prioritypatent/JPH0324079Y2/ja
Priority claimed from JP17241385Uexternal-prioritypatent/JPS6280600U/ja
Application filed by Hitachi Shipbuilding Eng CofiledCriticalHitachi Shipbuilding Eng Co
Publication of IN167322BpublicationCriticalpatent/IN167322B/en