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经营范围
发明名称
Well bore testing apparatus
摘要
申请公布号
US3311173(A)
申请公布日期
1967.03.28
申请号
US19640379125
申请日期
1964.06.30
申请人
BAKER OIL TOOLS, INC.
发明人
JR. WALDO W. HENSLEE,;COCKRELL DARRYL W.
分类号
E21B34/12
主分类号
E21B34/12
代理机构
代理人
主权项
地址
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