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