Mechanical equipment sales; Mechanical parts and components sales; Pneumatic power machinery and components sales; Gas compression machinery sales; Mining machinery sales; Mechanical and electrical equipment sales; Agricultural machinery sales; Hydraulic power machinery and components sales; Construction engineering machinery sales; Casting machinery sales; Mechanical equipment leasing; Agricultural machinery leasing; Electronic and mechanical equipment maintenance (excluding special equipment); Metal product sales; Instrument and meter sales; Electronic component wholesale; Fire-fighting equipment sales; Hydraulic, pneumatic, and sealing component and system sales; Pipeline transport equipment sales; Office equipment sales; Wind turbine generator set and component sales; Pump and vacuum equipment sales; Mold sales; Gas, liquid separation and purification equipment sales; Spray guns and similar appliances sales; Seal sales; Agricultural, forestry, animal husbandry, and fishery specialized instrument and meter sales; Oil refining and chemical production special equipment sales; Fastener sales; Metal wire rope and product sales; Metal cutting machine tool sales; Metal chain and other metal product sales; Metal structure sales; Machine tool functional parts and accessories sales; Optical fiber sales; Optical cable sales; Fan and blower sales; High-speed rail equipment and accessory sales; Pneumatic and electric tool sales; Optoelectronic device sales; Electronic components and electromechanical component equipment sales; Electronic measuring instrument sales; Capacitor and supporting equipment sales; Electrical equipment sales; Battery sales; Gear and gear reducer and gearbox sales; Vibration and noise reduction equipment sales; Railway rolling stock accessory sales; Non-ferrous metal alloy sales; Electrical accessory sales; Electronic product sales; Container sales; High-speed precision heavy-duty bearing sales.