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旧 Sep 28th, 2012, 22:15     #15
pacificblue
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默认

我觉得,5"和1"比,因为面积要大,air resistance会比较小

我觉得如果是冷气的话,airflow比较高,会有区别

如果是暖气,CFM要求不高,可能差别不大
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