APPARATUS FOR DIRECTIONAL DRILLING,申请号GB19840017849-传众专利搜索

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发明名称	APPARATUS FOR DIRECTIONAL DRILLING
摘要
申请公布号	GB8417849(D0)	申请公布日期	1984.08.15
申请号	GB19840017849	申请日期	1984.07.13
申请人	CHRISTIANSEN INC	发明人
分类号	E21B4/02;E21B7/06;(IPC1-7):E21B7/06	主分类号	E21B4/02
代理机构		代理人
主权项
地址

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