spare part

This was the rush hour; Lee knew that it would be the same in all the tool and spare part distribution centers of The Brain.

It is so easy to say that a telegram will bring a cylinder head or other spare part to the desired point.

Cowdie, though a spare part about the aerodrome, was quite a genius in his way.

There isn't a single spare part aboard for any of these devices.

"No, it was a short letter to mother," replied the Spare Part in a choking voice.