Drehbohrer,申请号CHD319141-传众专利搜索

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发明名称	Drehbohrer
摘要
申请公布号	CH319141(A)	申请公布日期	1957.02.15
申请号	CHD319141	申请日期	1953.12.02
申请人	HUGHES TOOL COMPANY	发明人	HARRIS REIFSCHNEIDER,WINSTON
分类号	E21B10/20	主分类号	E21B10/20
代理机构		代理人
主权项
地址

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