841011 Hydraulic Turbines, Water Wheels, of a Power Not Exceeding, 1, 000kw
841012 Hydraulic Turbines and Water Wheels, Power 1, 000-10, 000kw
841013 Hydraulic Turbines, Water Wheels, of a Power Exceeding 10, 000kw
841090 Parts of Hydraulic Turbines and Water Wheels, Including Regulators