Fluid well construction,申请号US19310541445-传众专利搜索

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发明名称	Fluid well construction
摘要
申请公布号	US1840694(A)	申请公布日期	1932.01.12
申请号	US19310541445	申请日期	1931.06.01
申请人	BRYAN THOMAS E	发明人	BRYAN THOMAS E.
分类号	E21B43/12	主分类号	E21B43/12
代理机构		代理人
主权项
地址

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