{HEAD ~ The air jet} is introduced into {TAIL ~ the passageway} 28 from an angular passageway J in FIG 2 
is introduced into
{ HEAD ~ The air jet } is introduced into { TAIL ~ the passageway } 28 from an angular passageway J in FIG 2
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