Uses 4-wire connection with 2 wires to line voltage and 2 wires to SPST control switch.
采用4线，2线连接到线电压，2线连接到单刀单掷控制开关。
The ventilator is also equipped with wire control switch for controlling the power supply . The product features convenient installation and diversified colors as white, blue, gray and brass.
还有线控开关控制电源式，安装更方便，颜色多样化，有白色、蓝色、灰色、古铜色。
Especially three-phase four-wire active power filter hardware has simple structure with only three group switch device.
特别是三相四线制有源电力滤波器硬件结构简单，只有三组开关器件。
The panel tester comprises a short circuit rod and a plurality of switch elements, wherein the switch elements are electrically connected with the short circuit rod and the electrode wire.
面板测试装置包括一短路杆以及多个开关元件，其中开关元件电性连接短路杆与电极配线。
An extension line with a certain distance to the steel bar discharge hole is provided with a contact travel switch. A wire is connected between the travel switch and a clutch electromagnet.
在距离钢筋出料口一定距离的延长线上设有一个接触式行程开关，行程开关与离合器电磁铁之间连接有导线。
An extension line with a certain distance to the steel bar discharge hole is provided with a contact travel switch. A wire is connected between the travel switch and a clutch electromagnet.
在距离钢筋出料口一定距离的延长线上设有一个接触式行程开关，行程开关与离合器电磁铁之间连接有导线。
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