machine ****
simple machine

You'll be surprised at how simple this common machine is.

It's just a machine; too simple to function longer than a few months.

He was, we liked to imagine, a simple machine in our hands.

A simple machine with a great "keep as new" feature.

Workers with hand tools or simple machines were busy among them.

It is also a part of another simple machine the inclined plane.

They either used a simple machine or a piece of wood with holes in it.

I could not know, of course, for on my world there are only the simplest machines.

He was the first to understand that simple machines do not create energy, only transform it.

In China, humans do the same work on much simpler machines.