Dust prevention in rock drills,申请号US19340720106-传众专利搜索

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发明名称	Dust prevention in rock drills
摘要
申请公布号	US2009066(A)	申请公布日期	1935.07.23
申请号	US19340720106	申请日期	1934.04.11
申请人	MARKLOW MITCHELL ERNEST	发明人	MITCHELL ERNEST MARKLOW
分类号	E21B21/01	主分类号	E21B21/01
代理机构		代理人
主权项
地址

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