Rock drilling mechanism,申请号US19360057394-传众专利搜索

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发明名称	Rock drilling mechanism
摘要
申请公布号	US2111033(A)	申请公布日期	1938.03.15
申请号	US19360057394	申请日期	1936.01.03
申请人	SULLIVAN MACHINERY COMPANY	发明人	OSGOOD CHARLES F.
分类号	E21B19/086	主分类号	E21B19/086
代理机构		代理人
主权项
地址

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