METHOD OF RELIEVING STRESSES IN A DEPOSIT,IN PARTICULARTHAT OF COAL,WITH GAS BREAKOUT AND ROCK OUTBURST HAZARD,申请号PL19840250957-传众专利搜索

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发明名称	METHOD OF RELIEVING STRESSES IN A DEPOSIT,IN PARTICULARTHAT OF COAL,WITH GAS BREAKOUT AND ROCK OUTBURST HAZARD
摘要
申请公布号	PL146380(B1)	申请公布日期	1989.01.31
申请号	PL19840250957	申请日期	1984.12.14
申请人		发明人
分类号	E21C;E21F;E21F7/00;(IPC1-7):E21F7/00	主分类号	E21C
代理机构		代理人
主权项
地址

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