The object was implemented in a low energy construction method with controlled ventilation (displacement ventilation in the classrooms) including the design for a natural secondary ventilation system.
其目标是采取一个能够控制通风的低能耗施工方法（在教室进行通风），包括自然二次通风系统的设计。
Whether the ventilation system is designed reasonable or not can significantly affects the construction of long highway tunnel for its high cost in economy and energy.
长大公路隧道的通风系统工程造价高、运营能耗大，通风系统设计合理与否，对长大隧道工程建设有重要影响。
Whether the ventilation system is designed reasonable or not can significantly affects the construction of long highway tunnel for its high cost in economy and energy.
长大公路隧道的通风系统工程造价高、运营能耗大，通风系统设计合理与否，对长大隧道工程建设有重要影响。
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