power-driven

At its onset, power-driven machinery did not seem to promise any release from such unintelligent toil.

For this purpose a light, power driven, tandem roller is used and the rolling is continued until the brick are thoroughly bedded.

In spite of Lilienthal's pioneer work years before, this was the first power-driven German plane which actually flew.

The day when the brothers Wright succeeded in accomplishing power-driven flight ranks as the first of these landmarks.

The control of the automatic switches by the operator's key sets is through the medium of a power-driven, impulse-sending machine.