本文对球面型超声波电动机的工作原理、基本结构、基本方程式进行了讨论。
The working principle, basic structure and basic equation to the spherical ultrasonic motor are discussed in the paper.
通过对电液阀结构与工作原理的分析，导出了电液阀的p—I（压力—控制电流）特性方程式。
The structure and the working principle of electronic-hydraulic valve are analysed and the P-I (Pressure-Control current)characteristic equation of electronic-hydraulic valve is derived.
提出一个建立在基尔霍夫定则及其对偶定则基础之上的线性电路解法，只需对网络图的结构进行分析，不需列写任何电路方程式。
A solution of linear circuit based on Kirchhoff"s rule and its dual rule is presented. By means of this solution, analysis are required to the structure of graph, no any circuit equations are needed."
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