变面积流量计 variable area flowmeter
闸板式面积流量计 gate type area meter
插塞式面积流量计 plug-type area meter
可变面积流量计 variable-area flow meter
变压头变面积流量计 variable-head variable-area flowmeter
活塞式变面积流量计 piston type variable-area flowmeter
闸门式变面积流量计 gate type variable area flowmeter
可变面积式流量计 variable area type flow meter
面积型流量计 area type meter
解决不同的流量问题有各种专门设计的面积流量计。
Special designs of area meters are available to solve many different flow problems.
水利行业经常要进行流量计算，这样就会遇到曲面拟合和曲面积分的问题。
The calculation of flow is often needed in water conservancy, and surface-fitting and double integration are usually met in order to solve this problem.
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