Surrounding on all sides (environment).
A device used for Increasing the pressure of a gas or a vapor
Maintenance that Is performed on operational equipment to prevent equipment failure in
A substance such as freon that by undergoing a change in phase (liquid to gas, gas to
liquid) releases or absorbs a large latent heat in relation to Its volume, and thus effects a
considerable cooling effect.
An instrument which measures changes in temperature and directly or indirectly controls
sources of heating and cooling to maintain a desired temperature.