Motor Driven Time Switches 电机时间控制开关
Timers and time switches 定时器和定时开关
Particular requirements for time switches 定时开关的特殊要求
Time delay switches 延时开关
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N-COUNT A time switch is a device that causes a machine to start or stop working at specific times. 定时开关
The working principle and the functions of the monostability multivibrator composed of 555 timer are introduced in the paper, and the time switches are designed.
介绍了用555定时器构成的单稳态触发器的工作原理，对其功能作了进一步探讨，在此基础上设计了一种具有实用价值的定时-非定时两用开关。
Tonight the nation switches from daylight-saving time to standard time.
今晚该国从夏令时间改为标准时间。
These switches turn on and off all the time, controlling how our cells work and how we respond to our environments.
受控于我们传感器的工作或者我们对周围环境的反应，这些开关可以随时打开或关闭。
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