METHOD OF CONTROLLING TOUGH ROOF,申请号SU19772476489-传众专利搜索

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发明名称	METHOD OF CONTROLLING TOUGH ROOF
摘要
申请公布号	SU623969(A1)	申请公布日期	1978.09.15
申请号	SU19772476489	申请日期	1977.04.12
申请人	KOMMUNARSKIJ GORNO-METALLURGICHESKIJ INSTITUT	发明人	BORZYKH ANATOLIJ F,SU
分类号	(IPC1-7):E21C41/04	主分类号	(IPC1-7):E21C41/04
代理机构		代理人
主权项
地址

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