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经营范围
发明名称
Well screen
摘要
申请公布号
US2090180(A)
申请公布日期
1937.08.17
申请号
US19360104577
申请日期
1936.10.08
申请人
BRYANT ROY B
发明人
BRYANT ROY B.
分类号
E21B43/08
主分类号
E21B43/08
代理机构
代理人
主权项
地址
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