Improvements relating to casing head equipment applicable to oil bore holes,申请号GB19310022826-传众专利搜索

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发明名称	Improvements relating to casing head equipment applicable to oil bore holes
摘要
申请公布号	GB389513(A)	申请公布日期	1933.03.13
申请号	GB19310022826	申请日期	1931.08.12
申请人	LEWIS MERVYN CECIL SEAMARK	发明人
分类号	E21B33/06;E21B33/08	主分类号	E21B33/06
代理机构		代理人
主权项
地址

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