Traditional orifice plate flowmeter had some demerits such as low measuring precision and high power dissipation.
传统孔板流量计测量精度较低，功耗较高。
This method has the disadvantages of low measuring precision, requiring environment of darkroom, and making eyes tired after a long-time testing.
此方法具有测量精度较低，使用环境要求暗室，长时间的测试容易使人眼疲劳等缺点。
Inaccurate measurement of the mean temperature of petroleum and its liquid products stored in a tank results in low measuring precision of the liquid volume.
油罐中石油及其液体产品的平均温度测量不准，将直接影响着液体体积的测量精度。
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