The cost is high and the error is big in volumetric flowmeasurement 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
Several structure forms are presented in detail. The practical flowmeasurement calculation formula is proposed.
详细介绍了均速管的几种结构形式，给出了实用流量测量的计算公式。
3
This paper introduces the effect of connecting pipe length of the flowmeasurement system on volumetric efficiency and torque characteristic of gasoline engines.