{HEAD ~ Apparatus} for {TAIL ~ the supply} of breathable gas cyclically at an inspiratory pressure and a lower expiratory pressure substantially in synchronism with a patients respiration 
for
{ HEAD ~ Apparatus } for { TAIL ~ the supply } of breathable gas cyclically at an inspiratory pressure and a lower expiratory pressure substantially in synchronism with a patients respiration
HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH