Annulus porting of horizontal tree,申请号GB19970027333-传众专利搜索

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发明名称	Annulus porting of horizontal tree
摘要
申请公布号	GB9727333(D0)	申请公布日期	1998.02.25
申请号	GB19970027333	申请日期	1997.12.24
申请人	ABB VETCO GRAY INC	发明人
分类号	E21B33/035;E21B33/04	主分类号	E21B33/035
代理机构		代理人
主权项
地址

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