ventilation-limited U 通风受限制的
Pressure Limited Ventilation 压力限制通气 ; 定压通气
volume limited ventilation 定容通气
limited ventilation dysfunction 限制性通气障碍
These principles include controlled temperature and humidity, limited traffic, ventilation requirements, and mechanisms that ensure that the environment remains as clean and dust-free as possible.
这些原则包括：受控的温度和湿度、受限的交通、通风及确保环境尽可能一尘不染的机制。
Ventilation systems with limited installation space.
安装空间紧张的通风空调系统。
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