APPARATUS FOR DRILLING WELLS,申请号SU19853893147-传众专利搜索

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发明名称	APPARATUS FOR DRILLING WELLS
摘要
申请公布号	SU1357542(A1)	申请公布日期	1987.12.07
申请号	SU19853893147	申请日期	1985.05.12
申请人	DO NI UGOLNYJ INSTITUT	发明人	PARSHIKOV NIKOLAJ B,SU
分类号	E21B33/13	主分类号	E21B33/13
代理机构		代理人
主权项
地址

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