The lift shown here is of mixed service use, that is, functions as both a passenger and a goods elevator.

在这里见到的升降机是作混合用途，亦即既是客运亦是货运电梯。

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Application: it's used to indicate the fault of equipments like the electric circuit in air-conditioning room or elevator for passenger or goods.

应用：用于指示空调房间电气线路、乘客和货物的提升等设备的故障。

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