Fan and blower manufacturing; Fan and blower sales; General equipment manufacturing (excluding special equipment manufacturing); Environmental protection special equipment sales; Mechanical equipment sales; Environmental protection special equipment manufacturing; Special equipment repair; Mechanical equipment leasing; Electrical equipment sales; Mechanical and electrical equipment manufacturing; Mechanical parts and components processing; Mechanical parts and components sales; Bearing, gear, and transmission component sales; Electrical mechanical equipment sales; Internet sales (excluding goods requiring sales permits); Domestic freight transport agency; Loading and unloading. Permitted items: Road freight transport (network freight); Road freight transport (excluding dangerous goods); Import and export agency; Technology import and export; Goods import and export.