THE METHOD OF COAL BEDS EXPLOITATION IN CONDITIONS OF INTENSIFICATED PRESSURES OF A ROCK MASS,申请号PL19860262939-传众专利搜索

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发明名称	THE METHOD OF COAL BEDS EXPLOITATION IN CONDITIONS OF INTENSIFICATED PRESSURES OF A ROCK MASS
摘要
申请公布号	PL152585(B1)	申请公布日期	1991.01.31
申请号	PL19860262939	申请日期	1986.12.10
申请人		发明人
分类号	E21C;E21C41/18;(IPC1-7):E21C41/18	主分类号	E21C
代理机构		代理人
主权项
地址

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