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发明名称	PLANER FOR UNDERGROUND MINING
摘要
申请公布号	PL149163(B1)	申请公布日期	1990.01.31
申请号	PL19850256989	申请日期	1985.12.20
申请人		发明人
分类号	E21C27/32;E21C27/34;(IPC1-7):E21C27/32	主分类号	E21C27/32
代理机构		代理人
主权项
地址

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