Verfahren zur Herstellung von Tiefbohrungen,申请号DE1932M121947D-传众专利搜索

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发明名称	Verfahren zur Herstellung von Tiefbohrungen
摘要
申请公布号	DE654745(C)	申请公布日期	1937.12.29
申请号	DE1932M121947D	申请日期	1932.11.27
申请人	N. V. SMELTBORING	发明人
分类号	E21B7/15	主分类号	E21B7/15
代理机构		代理人
主权项
地址

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