The cost is high and the error is big in volumetric flow measurement method and velocity measurement.
容积式流量测量方法和速度式流量测量方法存在费用高，误差大的缺点。
2
Volumetric gas analyzer is a common kind of instrument used in thermal measurement.
容积式气体分析仪是各类热工测试常用仪器。
3
This paper introduces the effect of connecting pipe length of the flow measurement system on volumetric efficiency and torque characteristic of gasoline engines.