On line instruments, such as turbine meter, vortex meter and positivedisplacementmeter are usually used for crude oil metering in oil fields.
计量分离器中常用涡轮流量计、涡街流量计或齿轮流量计等在线式仪表计量原油产量。
2
The characteristics of positivedisplacement flow meter are introduced, and the main factors for lectotype and the matters needing attention in the application are discussed.