The axle sleeve is then greased, and the new tire is slid smoothly on.

轮轴上涂上润滑油，然后把新轮胎滑上去。

A sleeve protects the axle, and a lifting tool pulls the tire off.

用一个套筒保护轮轴，然后用重工具把轮胎卸下来。

So a hand pushing an object, sea sauce, scissors, or a wheel axle are all examples of first-class levers.

因此，推动物体手、海酱、剪刀或轮轴都是一级例。

With the push of a button, the twin turboshaft engines roared to life.

按下按钮，双涡轮轴发动机轰鸣来。

If you put heavy stuff close to the axis of symmetry, or close to the wheel axis, then it's stable, too.

“如果你把重物放对称轴或轮轴附近，那行李也会稳定。”

The helicopter is powered by two Turbomeca Makila 2A1 turboshaft engines located above the cabin.

该直升机由位于机舱上方两台透博梅卡 Makila 2A1 涡轮轴发动机提供动力。

He reasoned that as the wheels spun, the mercury would flow to the bottom of each reservoir, leaving one side of the wheel perpetually heavier than the other.

他这样解释，随着轮轴转动，水银会顺着流向每个储液槽底部，这样会使滚轮一边永远比另一边重。

The CH-47 is propelled by two Lycoming T55 turboshaft engines, one on each side of the helicopter's rear pylon, connected to the rotors by drive shafts.

CH-47 由两台莱康明 T55 涡轮轴发动机驱动，直升机后挂架两侧各一台，通过传动轴与旋翼连接。

The four wheels were under the panels, and the axles of the wheels were attached to the stand. The diameter of each wheel was a cubit and a half.

四个轮心以下，轮轴与座相连，每轮高一肘半。

The wheel and axle is made up of a circular frame that revolves around a shaft or rod — a device that, in its earliest forms, was probably used for lifting water buckets from wells.

轮轴是由一个围绕轴或旋转圆形框架组成——这种装置其最早形式中，可能用于从井中提水桶。