At their most basic, a sealed tube allows a fan to make a vacuum.

在最基本的情况下， 密封管允许扇产生。

But if you want to get started with MicroMouse, you don't need to worry about wheel count or vacuum fans or even diagonals.

但如果你制作MicroMouse，你不需要心轮子的数量、扇甚至对角线移动。

At the scale of MicroMouse, a vacuum fan, often just built from handheld drone parts, is enough to generate a downward force five times the mouse's weight.

在MicroMouse的尺度上， 一个扇，通常仅由手持无人机零件制成，就足以产生相当于鼠标重量五倍的向下力。