控制面板上除制冷、风扇、风扇速度等控制开关外，还应有工作指示灯和故障指示灯。
In addition to control switches of refrigeration, fan, fan speed etc. on control panel, it should also be equipped with operation and fault indicator lamps.
由于龙卷风造成停电，许多十字路口的指示灯无法正常工作，使得众多汽车拥挤而引起混乱。
Stop lights at intersections weren't working in many places because of a power outage, causing confusion among motorists and considerable congestion.
各种工作状态都有指示灯显示。
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