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1·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。

2·A differential pressure gauge is recommended for test no. 1 rather than a manometer for the following reasons: It utilizes minimum time to perform the test.

对于检测1，建议采用差压表，而不要采用流体压力表，理由在于差压表进行检测的时间最短。

3·Lastly, the paper USES SIMULINK to the compare differences between the nonlinear and linear manometer differential equation.

最后利用SIMULINK比较了非线性与线性流体压强计微分方程。

4·The presentation of usage of liquid column manometer. The correct use method and error correction of U tube manometer and double tube differential pressure gauge were analysed.

主要介绍了液柱压力计的正确使用方法和误差分析。给出了U 型管压力计和双管差压计的测量精度。