The unit working parameter equations and hydraulic efficiency parameter equations for geometrically similar water turbomachinery are derived.
根据水涡轮机械的工作原理，对几何相似的水涡轮机械，导出了其单位工作参数所必须满足的方程。
The constitution, working principle, technical parameter & example of application of auto monitoring system for mine fan unit are introduced.
介绍了矿井通风机装置的自动监测系统的构成、工作原理、技术参数及其应用实例。
A medium frequency pulsed starting arc unit, which consistS of a voltage dowble is introduced in this paper, and its working principle and parameter design are also analyzed.
介绍了一种用逆变方式和倍压整流方式构成的中频逆变式引弧器，并对其工作原理及参数设计进行了分析。
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