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。
It was suitable to be used in ASEA type high power relay as the elastic element of insert-pull pieces.
它特别适用于大功率ASEA型继电器接插件，也可用于其他弹性元件。
The common faults of S1240 (ELC type) SPC exchange are in user mod ul e, relay module and metering module in daily maintenance work.
在对S1240 (elc型)程控交换机进行日常维护时，常见故障有用户模块、中继模块和计费模块的故障。
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