在导翼中自由振荡的球有利于全流道流动，最大限度减小湍流和振荡。
Free oscillation of ball in guide ribs facilitates full port flow with minimum turbulence and chatter.
本文分析了螺旋进气道在生产过程中的偏差而导致气道几何参数的变化对气道流动特性的影响。
The paper analyzes the effect of geometrical parameter variations of helical port due to some tolerances in manufacturing, configuration on the inlet air flow characteristics.
它不但移动灵活，而且不产生有形物排放，不队外界造成任何污染，成了城市里一道流动的风景线。
It not only flexible and mobile, but do not produce visible emissions, and do not cause any pollution outside, become a mobile city scene.
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