This article introduces working principle and features of electronic switch machine, and gives the hardware and software composition of the testing system.
介绍转辙机试验台检测系统的工作原理及性能特点，给出检测系统的硬件和软件构成。
The composition and working principle, advantages of secondary power switch were introduced.
介绍了二次送电开关的结构、工作原理及优点。
The article describes the origination of sleeper hydraulic pressure switch machine design and explains its structure, working principle, characteristics, and application effects.
介绍了轨枕型液压转辙机的设计由来，并简要说明了其结构、工作原理、技术特点及应用效果。
The working principle of colour TV supply source circuit and fault analysis were described. Some maintenance examples are helpful for repairing other switch supply source circuits.
介绍了彩显电源电路的基本原理及故障的分析和维修实例，对维修其它开关电源电路具有借鉴作用。
An intelligence switch box is designed by use of analogue electronic elements and digital electronic elements. The paper introduces the functions and working principle of the device.
用模拟电子元件和数字电子元件设计一种智能开关盒，介绍这种装置的作用和工作原理。
The paper emphatically introduces the working principle of functional units of flameproof intelligent soft-start switch.
本文着重介绍隔爆智能软起动开关各功能单元的工作原理。
Introduction was made to the composition and working principle of a power-off time delay relay which adopts CMOS digital circuit, digital dial disc for switch setting and without auxiliary power.
介绍了一种采用CMOS数字电路、数字拨盘开关整定、无辅助电源的断电延时继电器的组成及工作原理。
It theoretically analyzes the working principle and the designing parameters of the control switch. The possibility of this kind of sucking disc has been proved by an experiment given in this paper.
理论上分析了控制开关的工作原理及其设计多数，通过实验证明了此吸盘的可行性。
It theoretically analyzes the working principle and the designing parameters of the control switch. The possibility of this kind of sucking disc has been proved by an experiment given in this paper.
理论上分析了控制开关的工作原理及其设计多数，通过实验证明了此吸盘的可行性。
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