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发明名称
Well tester
摘要
申请公布号
US2222829(A)
申请公布日期
1940.11.26
申请号
US19380188625
申请日期
1938.02.04
申请人
HUMASON GRANVILLE A;CLAY WALTER J
发明人
HUMASON GRANVILLE A.;CLAY WALTER J.
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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