Production, processing, and sales of laboratory plasticizing equipment, dust-proof spray devices, mechanical tools and accessories, ultra-high molecular weight coal bunker liners, perfluoro fireproof and antistatic composite sheets, acid and alkali resistant industrial synthetic sheets; anti-corrosion coating, decoration, and repair of locomotives, vehicles, and passenger cars; manufacturing of acid and alkali resistant containers; sales of anti-corrosion and thermal insulation materials (excluding dangerous goods).