这个古老的梦想终于在1940年实现了。当时，一名俄罗斯工程师驾驶了一艘外形奇特、顶部装有旋转风扇的钢管船。
The ancient-dream was finally realized in 1940 when a Russian engineer piloted a strange looking craft of steel tubing with a rotating fan on top.
重新设计的轴承系统寿命长，后面加带了一个平衡盘，大大减小了旋转风扇系统的震动。
Their redesigned bearing system contributes to longer life and a rear-balancing disk significantly reduces vibration of the blower's rotating fan system.
即使在汽车熄火及锁着的时候，这些冷却风扇也在呼呼旋转着，所以当你回到车内时，你无需开大耗电的空调。
Even when the car is off and locked, these fans whir around, so when you step back into it you don't need to crank up the power-hungry air conditioning.
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