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