A machine that takes energy produced in a coal-burning power plant 200 miles away and transforms it into compressed air that travels by hose to a Chicago Pneumatic impact wrench that grips rusty suspension bolts last tightened 40 years ago by someone in Abingdon, Oxfordshire, and rounds them off
A machine that compresses or pressurizes air; for scuba purposes, air is compressed from the atmospheric level (14 7 psi at sea level) to the capacity of the tank, usually between 2500-3000 psi
An auxiliary designed to furnish air under pressure for pneumatic tools, cleaning purposes etc A form of compressor in common use is the single stage type