orifice meter

基本解释

The most commonly used method for measurement of gas is the orifice meter.
孔板流量计是测量气体流量最常用的方法。
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Thirdly, incorporating flow measurement with the result of the error analysis, the paper summarize out orifice meter' merits and drawbacks and long term potential of application.
结合流量测量的误差分析结果总结出孔板流量计的优缺点及发展前景。
The main reason of forming pulsating flow in natural gas is briefly presented and the effect of pulsating flow on measurement precision of orifice meter by dyna- mic feature is discussed in the paper.
本文简要介绍形成天然气脉动流的主要原因，并从流量计的动态特性讨论脉动流对孔板流量计测量精度的影响；

a plate having a central hole that is placed across the flow of a liquid, usually between flanges in a pipeline. The pressure difference generated by the flow velocity through the hole enables the flow quantity to be measured