Deep well drilling and coring system,申请号US19320610633-传众专利搜索

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发明名称	Deep well drilling and coring system
摘要
申请公布号	US1996132(A)	申请公布日期	1935.04.02
申请号	US19320610633	申请日期	1932.05.11
申请人	WALKER CLINTON L	发明人	WALKER CLINTON L.
分类号	E21B10/64	主分类号	E21B10/64
代理机构		代理人
主权项
地址

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