Hydraulic power machinery and components manufacturing; Hydraulic power machinery and components sales; Material handling equipment manufacturing; Pneumatic and electric tool manufacturing; Construction engineering machinery manufacturing; Hydraulic, pneumatic and sealing components and systems manufacturing; Hydraulic, pneumatic and sealing components and systems sales; Pneumatic and electric tool sales; Industrial automatic control system device sales; Pump and vacuum equipment sales; Material handling equipment sales; Mechanical equipment research and development; Environmental protection special equipment manufacturing; Environmental protection special equipment sales; Electronic product sales; Instrument and meter sales; Intelligent robot sales; Artificial intelligence hardware sales; Servo control mechanism sales; Intelligent material handling equipment sales; Rail transit engineering machinery and parts sales; High-speed rail equipment and parts sales; Railway rolling stock parts sales; New energy prime mover equipment sales; Metal cutting processing services; Hardware product retail; Mechanical and electrical equipment manufacturing; Mechanical and electrical equipment sales; Nuclear power equipment complete sets and engineering technology research and development; Professional design services; General equipment manufacturing (excluding special equipment manufacturing); Special equipment sales; Land use rights leasing; Non-residential real estate leasing.