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发明名称
Apparatus for cementing wells
摘要
申请公布号
US2164190(A)
申请公布日期
1939.06.27
申请号
US19370127058
申请日期
1937.02.23
申请人
SHELL DEVELOPMENT COMPANY
发明人
KLOMP JOHAN WILLEM
分类号
E21B33/14
主分类号
E21B33/14
代理机构
代理人
主权项
地址
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