37 Industrial furnace installation and repair; repair and maintenance services for industrial process and equipment, namely, repair and maintenance of industrial furnaces; maintenance, repair and reconstruction of furnaces, refractory walls, coke oven walls, refractory furnace wall components, refractory products in the nature of refractory construction materials, and refractory furnace wall components; ceramic welding; furnace re-bricking and rebuilding; installation of acid resistant linings for industrial process vessels and industrial flooring systems; construction consultation; installation, repair and replacement of glass, aluminum, nonferrous metals and their alloys; installation of thermal insulation for process control, for condensation control, and for energy/heat conversions; installation of insulation for firestopping and structural fireproofing; installation of rotary kilns, heat exchangers, tertiary air duct (TAD), coolers, cyclones, and shaft kilns