Constant orifice differential pressure is the premise for high accuracy hydraulic measuring, so thorough analyse of orifice differential pressure control technology has been taken.

阀口压差的稳定是高精度液动测量的保证，因此深入研究了阀口压差控制技术。

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It has the feature of automatic measuring, computer controlling, hydraulic driving, continuous speed variation and so on. It can keep an engine working at around optimal temperature.

这种新型的控制系统具有自动测量、微机控制、液压驱动、无级变速等特点，可以使发动机在最佳温度下工作。

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This paper establishes the mathematics model and carries out theory 's analyses for measuring pressure of hydraulic system by ultrasonic based on examinations.

本文在实验研究的基础上对超声波检测液压系统的压力参数进行了理论分析并建立了实用的数学模型。

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The Roman architects and hydraulic engineers who designed this bridge, which stands almost 50 m high and is on three levels the longest measuring 275 m created a technical as well as an artistic masterpiece.

UNESCO: Culture