The rotation speed of crank and air flow speed are the main factors.

其主次因素顺序为曲柄转速和风扇进风口风速。

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The coming cold is connected to the lower flow speed of the Gulf Stream, which causes it to send less warm air to Europe.

这种极端天气的形成是由墨西哥湾暖流活动速度减缓，从而输往欧洲的暖空气减少所致。

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Therefore, double screw compressor and worm compressor compared, in the same speed of the units inside less number of exhaust air ripple, big air flow noise.

因此，双螺杆压缩机与蜗杆压缩机相比，在相同转速下单位内排气次数少，气流脉动大，气流噪声大。

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Modern cars like the Cadillac ATS, Dodge Dart and Ford Escape, for example, have shuttered panels in the grille that allow air to flow more smoothly around the vehicle, depending on speed and driving conditions.

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