观察发现，几何参数相同时，封闭式翅片形式在总散热量、单位体积散热量和金属热强度方面均优于开放式翅片形式。
The results show that the closed finned tube is much more excellent than the opening finned tube on gross heat, heat of unit volume and metal thermal intensity with the same geometric parameters.
观察发现，几何参数相同时，封闭式翅片形式在总散热量、单位体积散热量和金属热强度方面均优于开放式翅片形式。
The results show that the closed finned tube is much more excellent than the opening finned tube on gross heat, heat of unit volume and metal thermal intensity with the same geometric parameters.
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