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。
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.
浮钟式压力计可以用来测量计示压力或差压力。
Bell gages may be used to measure gage pressure or differential pressure.
浮钟式压力计可以用来测量计示压力或差压力。
Bell gages may be used to measure gage pressure or differential pressure.
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