在交流电路中常采用空气阻尼型时间继电器，它是利用空气通过小孔节流的原理来获得延时动作的。

Often in ac circuit by air damping model time relay, it is to use the principle of air through orifices throttling to obtain delay action.

youdao

早期在交流电路中常采用空气阻尼型时间继电器，它是利用空气通过小孔节流的原理来获得延时动作的。

Early in the circuit often USES air damping model time relay, it is to use the principle of air through orifices throttling to obtain delay action.

youdao

目前最常用的为大规模集成电路型成的时间继电器，它是利用阻容原理来实现延时动作。

The most commonly used for large scale integrated circuit of the time relay into, it is to use resistance to achieve delay action let principle.

youdao