Normally powered by hydraulic machinery, compactors take many shapes and sizes.

This means continuous effective filtration, the ideal is a reverse-flow undergravel system, but a normally powered u/g system will do.

The equipment is normally powered from batteries.

Although normally powered by the motor, it carried its own battery pack for use in an emergency.

A box motor, in railroad terminology, is a self-propelled boxcar, normally powered by electricity and running on an interurban railway or a streetcar line.

Normally powered by hydraulics, compactors take many shapes and sizes.

The chain travels through a steel trough, and is normally powered by one or more motors which are positioned under the lift hill.

The tiny fan inside his pith helmet, normally powered by solar energy, will be battery-powered tonight.

The air motor is normally powered by compressed air at pressures of 10-30 bar.

The process is usually carried out by machines of a professional standard which are normally powered by petrol engines.