Intermediate relay is a type of control undervoltage relay which is used to add the amount of control signal or amplify the signal.
在自动化控制系统中采用大量的中间继电器，其工作的可靠性对控制系统工作的可靠性是至关重要的。
Calculation of current coil is discussed to middle relay and signal relay, lay stress on signal relay that contents condition and selects a type in different circumstances.
介绍中间继电器和信号继电器电流线圈的计算，着重分析信号继电器所需满足的条件和在不同情况下的选型。
Calculation of current coil is discussed to middle relay and signal relay, lay stress on signal relay that contents condition and selects a type in different circumstances.
介绍中间继电器和信号继电器电流线圈的计算，着重分析信号继电器所需满足的条件和在不同情况下的选型。
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