This paper expounds the measuring principle of ultrasonic liquid gauge, its practical hardware circuit and software design method.

阐述了超声波液位计的测量原理，给出了实用的硬件电路与软件设计方法。

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The precision of liquid column manometer was described. The correct use method and error correction of U tube manometer and double tube differential pressure gauge were analysed.

叙述了液柱式压力计的精度，对U形管压力计和双管差压计的正确使用方法及误差修正做了简要分析。

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Normal Pressure Gauge is applicable for measuring the pressure of liquid, steam and gas without possibility like explsion, crystal, solidification and erosion on steel or alloy cooper.

一般压力表适用于测量无爆炸危险，不结晶，不凝固及对钢及铜合金不起腐蚀作用的液体，蒸汽和气体等介质的压力。

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The digital "eyebrow" display at the top of the instrument panel provides high visibility for the Eco indicator and speedometer, while the lower liquid crystal meter display houses the new percentage style state-of-charge meter, power meter, battery temperature gauge, multi-function display, remaining energy gauge, capacity level gauge and distance to empty display.

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