7 Cyclone Plastic Recovery Units, Sand Dryers, Dryers, Coolers, Fluidized Bed Dryers, Fluidized Bed Coolers Used in the Processing of Coal, in Solid Waste and Metals Recovery Systems and in Industrial Mineral Systems
37 Construction, Repair, Servicing and Maintenance of Coal Processing Plants, Solid Waste and Metals Recovery Systems and Industrial Mineral Systems
42 Engineering and Design of Coal Processing Plants, Solid Waste and Metals Recovery Systems, and Industrial Minerals Systems