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经营范围
发明名称
Flowing device, tubing, and casing flow
摘要
申请公布号
US2314868(A)
申请公布日期
1943.03.30
申请号
US19390308305
申请日期
1939.12.08
申请人
ALEXANDER BOYNTON
发明人
BOYNTON ALEXANDER
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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