Prevailing wind, inlet, outlet, vent, operating zone, backward flowing, cap, wind board.
主导风，进风口，排风口，风口，工作区，倒灌，风帽，挡风板。
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。
Lower manhole, smoke vent, cold-blast inlet, transition pipe, telescoping pipeline, etc.
下部人孔、烟口、冷风口入口、转折管、变径管等。
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