METHOD AND APPARATUS FOR SELECTIVELY SHIFTING A TOOL MEMBER.,申请号GB19900001707-传众专利搜索

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发明名称	METHOD AND APPARATUS FOR SELECTIVELY SHIFTING A TOOL MEMBER.
摘要
申请公布号	GB2228028(A)	申请公布日期	1990.08.15
申请号	GB19900001707	申请日期	1990.01.25
申请人	* BAKER HUGHES INCORPORATED	发明人	MARK E. * HOPMANN;DOUGLAS JAMES * MURRAY;SCOTT CLAYTON * STRATTAN
分类号	E21B34/10;E21B34/12;E21B34/14	主分类号	E21B34/10
代理机构		代理人
主权项
地址

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