...quare finned tube）；2）、圆形翅片管；3）、螺旋翅片管（spiral finned tube）；4）、纵向翅片管（Longitudinal Finned Tube）5）、波纹形翅片管；6）、螺旋锯齿状翅片管（Helical Serrated Finned Tubes）；7）、针状翅片管；8）、整体板状翅片管（板翅）；...
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改造后的运行效果表明，纵向翅片管式换热器的使用寿命是改造前的2倍，且运行平稳。
The operation efficiency for the improved device shows that the service life is 2 times of unimproved exchanger with a high operating stability.
结果表明，封闭式纵向翅片管的散热量、金属热强度以及自然对流换热系数都要高于开放式翅片管。
As a result, heat dissipating capacity, metal thermal intensity and free convection heat transfer coefficient of the longitudinal closed finned tube are higher than those of the open finned tube.
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