Deep well drilling apparatus,申请号US19330692677-传众专利搜索

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发明名称	Deep well drilling apparatus
摘要
申请公布号	US2049971(A)	申请公布日期	1936.08.04
申请号	US19330692677	申请日期	1933.10.07
申请人	HANS MUEGGE	发明人	MUEGGE HANS
分类号	E21B7/00	主分类号	E21B7/00
代理机构		代理人
主权项
地址

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