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