Then why are your people looking at propellers ?

那你们这些人为什么查的是螺旋桨?

We 've managed to achieve propulsion through hand-powered propellers .

我们已经成功地研制出了手动推进器。

Hb-sia uses four electric motors turning propellers .

hb-sia使用四台电机驱动螺旋浆。

The engines used by ark angel are electric motors driving counter-rotating propellers , mounted in pods below the hull .

方舟天使使用的引擎是反向旋转的螺旋桨驱动的电动马达，安装在船体下的分离舱中。

These are similar to the azimuth thrusters already used on some vessels : propellers on pods that can be rotated to push the ship in different directions , making a rudder unnecessary .

它同已经安装在一些船只的方位推进器有点类似：螺旋桨荚能够在不停旋转从各方推动船只，使得船舵变得举无轻重。