标准查询 标准查询圆形截面封闭管道中流体流速的测定 对截面某一点上的速度测量法
Determination of flowrate of fluids in closed conduits of circular cross-section; Method of velocity measurement at one point of the cross-section
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标准查询Determination of flowrate of fluids in closed conduits of circular cross-section; Method of velocity measurement at one point of the cross-section
