{HEAD ~ The motor controller} sends out {TAIL ~ a signal} to control an electric motor and turbine to generate the desired inspiratory and expiratory pressures 
sends out
{ HEAD ~ The motor controller } sends out { TAIL ~ a signal } to control an electric motor and turbine to generate the desired inspiratory and expiratory pressures
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH