METHOD OF FILLING WORKED-OUT VOIDS IN UNDERGROUND MINES,申请号PL19860261280-传众专利搜索

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发明名称	METHOD OF FILLING WORKED-OUT VOIDS IN UNDERGROUND MINES
摘要
申请公布号	PL261280(A1)	申请公布日期	1987.03.23
申请号	PL19860261280	申请日期	1986.09.02
申请人		发明人
分类号	E21F;(IPC1-7):E21F/	主分类号	E21F
代理机构		代理人
主权项
地址

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