It is defined by the expanded use of resources and energy which power machines.

Petroleum became an important commodity after the discovery it could be used to power machines.

Even with power machines like he had at home, there was just too great a chance of conflicts if you didn't.

This energy is made into electricity, which then can be used to power machines and heat homes.

We have a power machine dominating the weapon shops in every large city on this planet.

We disabled the power machine for the boots this morning.

The real power machine, however, is the larger Quadra 900.

The power machines are manned by guards who do not know how to operate them.

At the time coal was one of the most in-demand natural resources, used to heat homes and to power machines in industries.

These power machines slice into the turf to allow aeration.