SET OF EQUPMENT FOR DEWATERING A SHAFT DURING DRIVING IT BY MEANS OF EXPLOSIVES,申请号PL19850253121-传众专利搜索

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发明名称	SET OF EQUPMENT FOR DEWATERING A SHAFT DURING DRIVING IT BY MEANS OF EXPLOSIVES
摘要
申请公布号	PL140700(B2)	申请公布日期	1987.05.30
申请号	PL19850253121	申请日期	1985.04.26
申请人		发明人
分类号	E21D;E21D5/12;E21F16/00;F04B47/00;(IPC1-7):E21F16/00	主分类号	E21D
代理机构		代理人
主权项
地址

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