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.
The following gadgets were developed to minimize the health hazards due to the vibration and noise in tractors and power tillers. 1  Antivibration devices (isolators) for tractor. 2  Antivibration devices (isolators) for power tiller. 3  Improved muffler for power tiller for reduced noise level.