Protective structure for sub-sea well heads or Xmas trees,申请号GB19890013886-传众专利搜索

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发明名称	Protective structure for sub-sea well heads or Xmas trees
摘要
申请公布号	GB2234002(A)	申请公布日期	1991.01.23
申请号	GB19890013886	申请日期	1989.06.16
申请人	* NORTHERN OCEAN SERVICES LIMITED	发明人	VICTOR * COOPER
分类号	E21B33/037	主分类号	E21B33/037
代理机构		代理人
主权项
地址

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