Inside a clean room, MAU(make-up air unite) system, process exhaust system and FFU(fan filter unit) system are coordinated to meet the requirements of those clean room indicators.

而以上这些指标的控制应由洁净室空调系统、排风系统和空气滤网系统等各个子系统来协同完成。

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When I got to my assigned room, it was hot, smelled like disinfectant and had a view of a large exhaust fan.

BBC: What to check out when you check in