Drill hole cleaning device,申请号US19360106667-传众专利搜索

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发明名称	Drill hole cleaning device
摘要
申请公布号	US2108195(A)	申请公布日期	1938.02.15
申请号	US19360106667	申请日期	1936.10.20
申请人	CROW RAYMOND L	发明人	CROW RAYMOND L.
分类号	B23Q11/00;E21B12/06;G01N1/04	主分类号	B23Q11/00
代理机构		代理人
主权项
地址

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