Rotary earth boring drill,申请号US19330672317-传众专利搜索

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发明名称	Rotary earth boring drill
摘要
申请公布号	US2047115(A)	申请公布日期	1936.07.07
申请号	US19330672317	申请日期	1933.05.22
申请人	CHICAGO PNEUMATIC TOOL COMPANY	发明人	REED CLARENCE E.
分类号	E21B10/10	主分类号	E21B10/10
代理机构		代理人
主权项
地址

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