Bop with partially equalized ram shafts,申请号GB19970026681-传众专利搜索

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发明名称	Bop with partially equalized ram shafts
摘要
申请公布号	GB2320514(B)	申请公布日期	2001.02.28
申请号	GB19970026681	申请日期	1997.12.17
申请人	* VARCO SHAFFER INC	发明人	BRYCE A * LEVETT;MIKE C * NICHOLSON
分类号	E21B33/06;(IPC1-7):E21B33/06	主分类号	E21B33/06
代理机构		代理人
主权项
地址

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