The differential pressure fluctuation has a quite great influence upon the measure precision in measuring natural gas flow rate with the measuring device by use of standard orifice plate.
在采用标准孔板节流装置测量天然气流量时，盖压波动对测量精度影响甚大。
To monitor the movement process of fissured water, self-designed a portable and microminiature device for auto - measuring the low flow rate.
为了测定裂隙岩体渗流的动态变化过程，本文自行设计了一种便携式、超小型的低流速自动测定装置。
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