But total pressure loss increases with the increasing of the velocity difference accompanied with the increase of the density and the static temperature ratio.

但速度差随密度比、静温比增大而增大时总压损失亦随之增大。

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The effect of the velocity difference on total pressure loss may be neglected, if the density and the static temperature difference are equal.

若密度比、静温比相同或相近时，速度差对总压损失的影响可忽略。

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For the insulating system, the required tracing medium temperature can be reduced with energy loss decreased by about 4% and energy level difference decreased by more than 60%.

对于保温系统，伴热介质的需求温度降低，损失和能级差可分别降低4%和60%以上。

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