Power system for well drilling,申请号US19320644978-传众专利搜索

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发明名称	Power system for well drilling
摘要
申请公布号	US2026709(A)	申请公布日期	1936.01.07
申请号	US19320644978	申请日期	1932.11.30
申请人	WALDO SHELDON	发明人	SHELDON WALDO
分类号	E21B3/02	主分类号	E21B3/02
代理机构		代理人
主权项
地址

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