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经营范围
发明名称
Flow meter using an expanded tube section and sensitive differential pressure measurement
摘要
申请公布号
GB0418655(D0)
申请公布日期
2004.09.22
申请号
GB20040018655
申请日期
2004.08.20
申请人
WEATHERFORD/LAMB INC.
发明人
分类号
E21B47/06;G01F1/00;G01F1/34;G01F1/44;G01F1/74
主分类号
E21B47/06
代理机构
代理人
主权项
地址
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