A system and method for determining physical location of an electronic display device located in a retail establishment of a retailer may include a support structure mechanically coupling the electronic display device to a fixture in the retail establishment. To detect a ground fault position to take an efficient measure against the ground fault, DC power input from a solar battery is converted into AC power and supplied to a system. The gas condensate co-produced in the partial oxidation reactor consists of mainly active sulfur oxides and serves as an excellent bonding agent to further enhance the bonding strength between the partially oxidized rubber particles and the cement mixes. Shredded plastic is fed between the cleaning discs and conveyed through the cleaning gap, and the shredded plastic is processed abrasively by the cleaning surfaces. For diagnostic applications, compounds containing a label and methods of use of such compounds are described. The tool can produce contours in the workpiece, or cut the workpiece, or both.