Emission reduction units for motors and engines, namely, catalytic converters, excluding aftermarket sales for motors and engines of construction machinery and equipment, mining machinery and equipment, earth moving and excavation machinery and equipment, off-highway vehicles for the foregoing, oil and gas machinery and equipment and electric power generating equipment

Emission reduction units for motors and engines, namely, catalytic converters, excluding aftermarket sales for motors and engines of construction machinery and equipment, mining machinery and equipment, earth moving and excavation machinery and equipment, off-highway vehicles for the foregoing, oil and gas machinery and equipment and electric power generating equipment