DRILLING RIG FOR BOREHOLES WITH SIMULTANEOUS CASING,申请号SU19884623575-传众专利搜索

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发明名称	DRILLING RIG FOR BOREHOLES WITH SIMULTANEOUS CASING
摘要
申请公布号	SU1680924(A1)	申请公布日期	1991.09.30
申请号	SU19884623575	申请日期	1988.12.22
申请人	KRYMSKOE PROIZV GEOLOGICHESKOE OB "KRYMGEOLOGIYA"	发明人	KHORYUSHIN IGOR G,SU;KHORYUSHIN ANDREJ I,SU
分类号	E21B7/28;E21B7/20	主分类号	E21B7/28
代理机构		代理人
主权项
地址

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