23rd November 2009
The grinding stone has been around for centuries. Man has used it to make his tools, weapons, and life better. However, the grinding stone has a dark side that has remained hidden until about a century ago. The coupling of the electric motor to the stone...
17th September 2009
Oxygen is a colorless, odorless gas. It is the most abundant chemical element found in air, sea and land.
The gas form of oxygen is used by humans to breath, and can also be used for welding and cutting. When oxygen is used for welding it is mixe...
03rd August 2009
He worked for a sign shop in the upper mid-West; his job was to weld the big signposts. The sign for the hotel was completed and the signposts now needed to be welded together. The welding would be done at the site where the sign was to be installed. H...
