bell alarm switch
常见例句
- Controlling room: it is made up of the optional push button, the sudden switch, the alarm bell push button and the electric lock, controlling up, down and stop of the lift car;
操纵厢：由层楼选择按钮、急停开关、警铃按钮、电气锁组成；控制轿厢的上行、下行和停止。
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