METHOD OF ENSURING WATER RUN-OFF IN PARTICULAR IN VERTICAL MINE EXCAVATIONS,申请号PL19780208975-传众专利搜索

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发明名称	METHOD OF ENSURING WATER RUN-OFF IN PARTICULAR IN VERTICAL MINE EXCAVATIONS
摘要
申请公布号	PL114869(B2)	申请公布日期	1981.02.28
申请号	PL19780208975	申请日期	1978.08.09
申请人		发明人
分类号	E21D;E21F16/00;(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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