ARM OF A MECHANICAL COAL MINER,申请号PL19870267175-传众专利搜索

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发明名称	ARM OF A MECHANICAL COAL MINER
摘要
申请公布号	PL155021(B1)	申请公布日期	1991.10.31
申请号	PL19870267175	申请日期	1987.08.03
申请人		发明人
分类号	E21C;E21C31/02;F16H57/00;(IPC1-7):E21C31/02	主分类号	E21C
代理机构		代理人
主权项
地址

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