Improvements in and relating to means for withdrawing casing from wells or bore holes,申请号GB19380036880-传众专利搜索

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发明名称	Improvements in and relating to means for withdrawing casing from wells or bore holes
摘要
申请公布号	GB522824(A)	申请公布日期	1940.06.27
申请号	GB19380036880	申请日期	1938.12.19
申请人	JAMES CUTHILL;THE OIL WELL ENGINEERING COMPANY LIMITED	发明人
分类号	E21B31/20	主分类号	E21B31/20
代理机构		代理人
主权项
地址

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