The bay windows in the boarding house are north-facing and positioned at different heights which allows for natural smoke control and offers views over the orchards.
公寓的窗户都是朝北开的，通过不同的高度设置，既可以进行自然通风，也可以看到果园美丽的风景。
When the train fire occur inside the tunnel with natural ventilation, how to control smoke spreading in order to ensure the safety of evacuation, is a worth deeply research project.
列车在自然通风隧道内发生了火灾，如何控制火灾烟气扩散以保证人员安全疏散，是值得深入研究的课题。
When the train fire occur inside the tunnel with natural ventilation, how to control smoke spreading in order to ensure the safety of evacuation, is a worth deeply research project.
列车在自然通风隧道内发生了火灾，如何控制火灾烟气扩散以保证人员安全疏散，是值得深入研究的课题。
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