DRILLING DIRECTIONAL BOREHOLES,申请号GB19860026220-传众专利搜索

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发明名称	DRILLING DIRECTIONAL BOREHOLES
摘要
申请公布号	GB2184761(A)	申请公布日期	1987.07.01
申请号	GB19860026220	申请日期	1986.11.03
申请人	* HUGHES TOOL COMPANY	发明人	JAY MILTON * EPPINK
分类号	E21B7/06;E21B7/08;E21B17/10;(IPC1-7):E21B7/08	主分类号	E21B7/06
代理机构		代理人
主权项
地址

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