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.
Generator-normally this term is used to describe an alternator which creates AC power using electromagnetism. Generators, Dynamos, and Batteries are the three tools necessary to create/store substantial amounts of electricity for human use. Batteries may have been discovered as early as 248 BC.