Nowadays, a commonwealth has come to mean any government in which all people involved have a say, or a loose formation of nations with a shared loyalty. It is also the official designation of a few states including, Kentucky, Massachusetts, Pennsylvania, and Virginia and some U.S. territories.
1 Pneumatic tools are powered by compressed air. 2  Common types of these air-powered hand tools that are used in industry include buffers, nailing and stapling guns, grinders, drills, jack hammers, chipping hammers, riveting guns, sanders and wrenches.
Pneumatic actuators can be used to produce both rotary and linear motion and are usually powered by an electric compressor. While motion can be created through other means, such as a hydraulic or electric motor, pneumatic actuators are safer, cheaper, more reliable, and often provide more power.neumatic actuators are safer than other means of producing motion because their gases are not likely to catch on fire unless specifically contained and ignited in a manner to do so. As pneumatic actuators only contain compressed gases, the gas can be stored even while no electricity is supplied to the actuator.