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;
操縱廂：由層樓選擇按鈕、急停開關、警鈴按鈕、電氣鎖組成；控制轎廂的上行、下行和停止。
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