The apparatus includes {HEAD ~ a combustion chamber communicating} with {TAIL ~ an air intake passage} and an air exhaust passage 
with
The apparatus includes { HEAD ~ a combustion chamber communicating } with { TAIL ~ an air intake passage } and an air exhaust passage
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH