抽风机是外置式电机，铝合金风叶，防爆，安全。

The exhaust fan has external motor and aluminum alloy blades, is explosion resistant and safe.

掣板上的抽风机开关掣在这里并不能运作。

The ventilation fan switch on the button panel does not work here.

如果一个主抽风机的电机无法启动，会发生警报并在操作控制台显示。

Should one of the main exhaust fan motors trip or fail to start, an alarm is initiated and indication is provided on the Operator Console Mimic.