General items: Sales of mechanical parts and parts; Sales of special equipment for pulp and paper making; General equipment repair; Mining machinery sales; Sales of special equipment for environmental protection; Wire and cable business; Sales of pumps and vacuum equipment; Valve and sales; Sales of power distribution switch control equipment; Instrumentation sales; Sales of labor protection products; Sales of rubber products; Security equipment sales; Sales of lighting fixtures; Sales of fire-fighting equipment; General machinery and equipment installation services; Labor services (excluding labor dispatch); Import and export of goods (except for projects subject to approval in accordance with the law, independently carry out business activities with a business license in accordance with the law)