The enclosure ventilation fan is mounted on the exterior of the enclosure.

机箱通风扇装在机箱外部。

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The Industrial Ventilation Fan is ideal for use in factories and warehouses.

工业换气扇是工厂和仓库的理想选择。

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A laptop's battery and ventilation fan are two other suspected common culprits.

手提电脑的电池和散热风扇是另外两个可能的原因。

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Smoke travels upwards, and if smokers are confined to the top level and adequate ventilation is in place (be it an open window or a small fan), then there can be no cause for concern to those non-smokers who sit downstairs.

BBC: TRAPPED BY INCONSIDERATE SMOKERS