Production and sales of metallurgical special equipment and accessories, metallurgical special rail vehicle accessories, air compressors and accessories, conveyors, conveyor belts, mechanical equipment, fitness equipment, electromechanical products, pipeline valves, agricultural machinery equipment, breeding equipment, mechanical accessories, fan accessories, and automotive mufflers; Processing and sales of elevators and accessories, automotive parts, hardware accessories, nylon parts, fasteners, standard parts, textile accessories, spinning accessories, stainless steel products, aluminum alloy products, machinery, chains, and sprockets; Sales of instrumentation, wires and cables, rubber products, plastic products, infrastructure materials, and steel.