For on-line calibration system of flowmeter, the working fluid flow is from the petroleum pipe line itself.
体积管工作时的液流，对于流量计在线检定系统，是来自输油管线本身。
The sixth chapter made an experiment study upon the fluid oscillation characteristics of vortex precession flowmeter.
论文第六章对旋进旋涡流量计的流体振动特性进行实验研究。
Impeller-type flowmeter in the years of practical application, its working principle is relatively simple, general talk about is the principle of angular momentum of fluid flow measuring device.
多年来，叶轮式流量计在许多领域得到了较多的实际应用，其工作原理比较简单，概括的讲就是应用流体动量矩原理测量流量的装置。
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