每个弯管流量计的流量系数须经过实际标定。
The discharge coefficient for each elbow flowmeter should be calibrated in practice.
涡轮流量计与旋涡流量计的流量系数随被测流体的物理性质变化而变化。基于这个原因，在流量计投入使用之前，应测取实际的流量系数。
The flow coefficients of Turbine Flow Meter and Votex Flow Meter will vary as the physical characteristics of the measured fluid change.
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