Dirt discharging means for auger-drill rig,申请号US19630312408-传众专利搜索

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发明名称	Dirt discharging means for auger-drill rig
摘要
申请公布号	US3190375(A)	申请公布日期	1965.06.22
申请号	US19630312408	申请日期	1963.09.30
申请人	LEE H. BOOKER;MELVIN W. SALVAGE	发明人	PEARSON CHARLES E.
分类号	E02F7/00;E02F7/06;E21B7/00	主分类号	E02F7/00
代理机构		代理人
主权项
地址

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