In the event of a vent fan failure, an alarm is initiated.
出现排气扇故障情况时，将出现报警。
An optional backup vent fan operates in the event of a primary vent fan failure.
如果主排气扇出现故障，则备用排气扇将启动。
The system uses a vent fan, a manually adjustable backpressure damper, a differential pressure-sensing gage, and an inlet air filter high differential pressure alarm switch.
此系统用一个排气扇，手动调节反压闸，压差传感器和一个进气过滤器压差高报警开关。
The system uses a vent fan, a manually adjustable backpressure damper, a differential pressure-sensing gage, and an inlet air filter high differential pressure alarm switch.
此系统用一个排气扇，手动调节反压闸，压差传感器和一个进气过滤器压差高报警开关。
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