3511  Steam, Gas, and Hydraulic Turbines, and Turbine Generator Set Units

Establishments primarily engaged in manufacturing steam turbines; hydraulic
turbines; gas turbines, except aircraft; and complete steam, gas, and
hydraulic turbine generator set units. Also included in this industry are
the manufacture of wind and solar powered turbine generators and windmills
for generating electric power. Establishments primarily engaged in
manufacturing nonautomotive type generators are classified in industry
3621; those manufacturing aircraft turbines are classified in industry
3724; and those manufacturing windmill heads and towers for pumping water
for agricultural use are classified in industry 3523.