train piston wind velocity
train piston wind velocity
列车活塞风速
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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It is very complex to calculate the aerodynamic drag of high-speed train running in railway tunnel with multi -shafts. And the difficulty is to calculate the velocity of piston wind.
在高速列车空气阻力计算中，多竖井隧道的列车空气阻力计算比较复杂，其难点在于多竖井的活塞风计算。
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