EXPANDABLE DRILLING BIT,申请号SU19884472433-传众专利搜索

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发明名称	EXPANDABLE DRILLING BIT
摘要
申请公布号	SU1712573(A1)	申请公布日期	1992.02.15
申请号	SU19884472433	申请日期	1988.08.23
申请人	SMIRNOV VYACHESLAV G,SU;TRAVKIN VITALIJ S,SU	发明人	SMIRNOV VYACHESLAV G,SU;TRAVKIN VITALIJ S,SU
分类号	E21B10/12	主分类号	E21B10/12
代理机构		代理人
主权项
地址

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