METHOD OF DRILLING WELLS,申请号SU19884394221-传众专利搜索

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发明名称	METHOD OF DRILLING WELLS
摘要
申请公布号	SU1521852(A1)	申请公布日期	1989.11.15
申请号	SU19884394221	申请日期	1988.02.12
申请人	ZAGARENKO ELENA A,SU	发明人	ZAGARENKO ELENA A,SU
分类号	E21B21/00;E21B17/22	主分类号	E21B21/00
代理机构		代理人
主权项
地址

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