Valves of metal, other than parts of machines; Manually operated metal valves; Metal valves not being parts of machines in the nature of gate valves; Metal valves not being parts of machines in the nature of globe valves; Metal valves not being parts of machines in the nature of ball valves
Metal GoodsControl valves for regulating the flow of gases and liquids; Automatic valves; Automatic valves for use in chemical plants, refineries, power plants; Pressure relief valves for regulating the flow of gases and liquids; Unloading check valves for the outlets of air compressors; Automatic safety relief valves
Electrical and Scientific ApparatusMaintenance and/or repair of valves; Repair, maintenance and modification of valves
Building Construction and Repair