METHOD OF ROOF CONTROL AT LONGWALLS,申请号SU19894672826-传众专利搜索

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发明名称	METHOD OF ROOF CONTROL AT LONGWALLS
摘要
申请公布号	SU1640420(A1)	申请公布日期	1991.04.07
申请号	SU19894672826	申请日期	1989.04.04
申请人	DO POLT INSTITUT	发明人	ALEKSANDROV SERGEJ N,SU;LEVCHENKO VALERIJ I,SU;ZBORSHCHIK MIKHAIL P,SU;MIMINOSHVILI ROMAN V,SU;NAZIMKO VIKTOR V,SU;SOROKIN VALENTIN I,SU
分类号	E21C41/18	主分类号	E21C41/18
代理机构		代理人
主权项
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