手动阀换向回路；
气动自动化系统是实现传动与控制的主要方式之一，其中由稳压元件、换向阀和气缸等所组成的气动控制回路更是工业自动化中常用的回路。
The pneumatic control circuit, which is consisted of the pressure regulator component, the direction valve and the cylinder, is the most commonly used circuit in the industrial automation.
用于低压交流回路的断路器，由于在过零换向电压不能满足再次阴极放电起弧的需要，因此具有容易灭 弧的优点。
In breakers for operation in low-voltage ac circuits, advantage is taken of the voltage required to establish a cathode spot.
针对液压缸差动回路输出速度受管道液阻及差动工作时换向阀工作状态影响的问题，分析了这些影响因素。
This paper points out the influence on the start-up circuit of the differential-voltage protection when the capacitors primary connection is changed.
针对液压缸差动回路输出速度受管道液阻及差动工作时换向阀工作状态影响的问题，分析了这些影响因素。
This paper points out the influence on the start-up circuit of the differential-voltage protection when the capacitors primary connection is changed.
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