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