Rollenbohrer fuer Tiefbohrungen,申请号DE1933R090371D-传众专利搜索

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发明名称	Rollenbohrer fuer Tiefbohrungen
摘要
申请公布号	DE664574(C)	申请公布日期	1938.09.02
申请号	DE1933R090371D	申请日期	1933.04.30
申请人	CLARENCE E. REED	发明人
分类号	E21B10/10	主分类号	E21B10/10
代理机构		代理人
主权项
地址

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