Oil-well pumping and drilling rig,申请号US19290338494-传众专利搜索

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发明名称	Oil-well pumping and drilling rig
摘要
申请公布号	US1775390(A)	申请公布日期	1930.09.09
申请号	US19290338494	申请日期	1929.02.08
申请人	CARL EURIT	发明人	EURIT CARL
分类号	E21B1/02;H03G3/16	主分类号	E21B1/02
代理机构		代理人
主权项
地址

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