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发明名称
Drilling rate measuring apparatus
摘要
申请公布号
US2957346(A)
申请公布日期
1960.10.25
申请号
US19570696519
申请日期
1957.11.14
申请人
CORE LABORATORIES, INC.
发明人
KNIGHT ROBERT F.
分类号
E21B45/00
主分类号
E21B45/00
代理机构
代理人
主权项
地址
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