The reasons of producing electric particle of gas and the condition of air flowing in large current enclosed busbar with forced air cooling are analysed.

分析了强迫风冷大电流封闭母线中气体带电粒子产生的原因和其中的气体流动状况；

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The forced air cooling is an important component of motorcycle, playing a key role in radiating heat, cooling and as well as keeping the normal temperature of engine.

强制风冷系统是坐式摩托车的重要组成部分，它起着散热冷却、保证发动机温度正常的作用。

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With a example design of a transmitter, the design and computation process of the method is discussed in detail, and reasonable design result of forced air cooling is presented.

并以某发射机的强迫风冷散热设计为例，详细阐述了此方法的设计计算过程，给出了强迫风冷系统合理的设计结果。

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