The switch can be a thermally activated mechanical relay built onto the slider.
该开关可以是构建在滑块上的热启动机械继电器。
Dual limit relays contain two comparators and potentiometers operating into a single electro - mechanical relay.
双限继电器包含两个比较器和一个电位器，在一个单一的机电继电器下运行。
The paper puts forward a new method to measure series battery voltage, mechanical relay is replaced by photoelectric relay to select each battery voltage.
提出一种串联电池组电压测量新方法：光电继电器取代机械继电器选通各节电池电压；
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