Rotary kelly hammer,申请号US19640345916-传众专利搜索

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发明名称	Rotary kelly hammer
摘要
申请公布号	US3259196(A)	申请公布日期	1966.07.05
申请号	US19640345916	申请日期	1964.02.19
申请人	HAWTHORNE HERBERT J	发明人	HAWTHORNE HERBERT J.
分类号	E21B3/02;E21B6/00;E21B7/00;E21B7/02	主分类号	E21B3/02
代理机构		代理人
主权项
地址

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