Well point and system therefor,申请号US19380234433-传众专利搜索

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发明名称	Well point and system therefor
摘要
申请公布号	US2176540(A)	申请公布日期	1939.10.17
申请号	US19380234433	申请日期	1938.10.11
申请人	MOORE THOMAS F	发明人	MOORE THOMAS F.
分类号	E21B7/18;E21B7/20;E21B43/08	主分类号	E21B7/18
代理机构		代理人
主权项
地址

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