Hydraulic drilling mechanism,申请号US19450628793-传众专利搜索

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发明名称	Hydraulic drilling mechanism
摘要
申请公布号	US2582217(A)	申请公布日期	1952.01.15
申请号	US19450628793	申请日期	1945.11.15
申请人	O'LEARY CHARLES M	发明人	O'LEARY CHARLES M.
分类号	B23B47/22;E21B19/08	主分类号	B23B47/22
代理机构		代理人
主权项
地址

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