A blower unit is connected to the motor to draw {HEAD ~ air} from {TAIL ~ the inlet} to the outlet 
from
A blower unit is connected to the motor to draw { HEAD ~ air } from { TAIL ~ the inlet } to the outlet
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH