Drill pipe cleaner,申请号US19470750747-传众专利搜索

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发明名称	Drill pipe cleaner
摘要
申请公布号	US2460481(A)	申请公布日期	1949.02.01
申请号	US19470750747	申请日期	1947.05.27
申请人	CHARLES P. MCKINNEY;J. C. BARNARD	发明人	ABEL LOGAN F.
分类号	B08B9/055;E21B37/02	主分类号	B08B9/055
代理机构		代理人
主权项
地址

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