Deep well cementing device,申请号US19380227367-传众专利搜索

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发明名称	Deep well cementing device
摘要
申请公布号	US2159640(A)	申请公布日期	1939.05.23
申请号	US19380227367	申请日期	1938.08.29
申请人	STROM CARL E	发明人	STROM CARL E.
分类号	E21B27/02;E21B33/12;E21B33/129;E21B33/1295	主分类号	E21B27/02
代理机构		代理人
主权项
地址

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