Processed sales: insulation of light composite corsets, grid cloths, anti-fibrous slurry, fibreglass products, vinyl glass slurry; sales of: sealed materials, fireproof materials, rock cotton products, glass cotton products, rubber products, aluminium silicate products, extruded plastics, polyurethane products, polybenzene plates, chemical products (other than hazardous chemicals), ethylene glacial slurry, ion exchange resin, sealed materials; heating engineering works, corrosive engineering works, fire protection works。