SPARK-SAFE,STRAY CURRENTS-SAFE SYSTEM FOR CONTROLLING TWO ELECTRIC TWO-WAY DRIVES,ESPECIALLY FOR MINING MACHINES,申请号PL19780203848-传众专利搜索

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发明名称	SPARK-SAFE,STRAY CURRENTS-SAFE SYSTEM FOR CONTROLLING TWO ELECTRIC TWO-WAY DRIVES,ESPECIALLY FOR MINING MACHINES
摘要
申请公布号	PL109796(B1)	申请公布日期	1980.06.30
申请号	PL19780203848	申请日期	1978.01.05
申请人		发明人
分类号	E21C31/00;H02P;(IPC1-7):E21C31/00	主分类号	E21C31/00
代理机构		代理人
主权项
地址

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