Welding services; rental of welding apparatus; rental of welding and soldering apparatus and machines; processing of structural steels; treatment of materials, namely shearing of steel; industrial treatment of effluents; processing of metals; metal casting; metal treating; electricity generation; incineration of industrial waste; production of energy; blacksmithing; recycling of waste and trash; millworking; processing of plastics; treatment of waste materials relating to environmental pollut...