APPARATUS FOR USE IN DRILLING,申请号GB19850029306-传众专利搜索

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发明名称	APPARATUS FOR USE IN DRILLING
摘要
申请公布号	GB8529306(D0)	申请公布日期	1986.01.02
申请号	GB19850029306	申请日期	1985.11.28
申请人	LUCAS, B R	发明人
分类号	E21B3/00;E21B3/02;E21B7/02;E21B19/00;E21B19/20;(IPC1-7):E21B7/02	主分类号	E21B3/00
代理机构		代理人
主权项
地址

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