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.
This also made possible the invention of the Franz electric metronome (1938). In this metronome a synchronous motor, like those used in electric clocks, drives a tempo beating hammer through a mechanical reduction which is adjustable from 40 to 208. These electro-mechanical units were produced through June, 1994.