Production and sales of reducers, electric drums, electroplating racks, titanium baskets, plug-in carts, plug-in racks, copper deposition racks, handcarts, bench vices, plastic products, bearings, motors, electrical appliances, hardware tools, standard parts, travel supplies, sports equipment, vehicle parts, construction machinery, machine tools and accessories, and stage tools; sales of steel, fire-fighting equipment, and labor protection supplies.