You can not be solved outside the exhaust fan duct layout in case of difficulties.

解决了您在不能布置外实验室设备排风机风管情况下的困难。

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The experimental result shows that the measurements with microphone are highly sensitive to airflow in the fan duct.

实验结果表明，风机管道中空气流动对传声器测量信号的影响很大。

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The thermal insulation prevents fire and engine operation heat damage to the composite inner wall of the fan duct cowl.

隔热毯可防止火焰和发动机 运行产生的热量对风扇函道内夹芯组件复合材料的损害。

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There's a second alternative: A growing number of New Yorkers are going for duct-free AC systems that involve a small, wall-mounted indoor fan powered by a separate outdoor unit the size of suitcase.

WSJ: Ugliness for All