{HEAD ~ A fuel injector} is positioned along {TAIL ~ the side} of the engine and arranged to deliver fuel into air flowing through the passage 
is positioned along
{ HEAD ~ A fuel injector } is positioned along { TAIL ~ the side } of the engine and arranged to deliver fuel into air flowing through the passage
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 OTH OTH OTH OTH OTH