Power units for wagon drills,申请号US19560624414-传众专利搜索

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发明名称	Power units for wagon drills
摘要
申请公布号	US2879857(A)	申请公布日期	1959.03.31
申请号	US19560624414	申请日期	1956.11.26
申请人	KREISS THEO R	发明人	KREISS THEO R.
分类号	E21B7/02	主分类号	E21B7/02
代理机构		代理人
主权项
地址

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