Low speed mean, no draught is caused.

所谓的低速，就是不产生气流。

Are you angry at the staff's low speed of dining selling?

您还在为食堂售饭的工作人员卖饭速度慢而生气么？

The belt driven pump runs at low speed for an extended life.

皮带驱动的泵低速运行，以便延长寿命。

A few days ago, the submarines came into contact at very low speed.

几天前，潜艇相撞时的速度非常低。

They briefly came into contact at a very low speed while submerged.

它们主要是在潜入水中时低速接触彼此。