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经营范围
发明名称
Testing tool for wells
摘要
申请公布号
US2189103(A)
申请公布日期
1940.02.06
申请号
US19380239779
申请日期
1938.11.10
申请人
DRIPPS HAROLD E;HENRY RAUSER
发明人
DRIPPS HAROLD E.;RAUSER HENRY
分类号
E21B49/08
主分类号
E21B49/08
代理机构
代理人
主权项
地址
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