The portion of {HEAD ~ the air outlet} opening around the nozzle should have a cross sectional area in the range of from 5 to 15 square millimeters and should be annular in shape with {TAIL ~ a generally uniform radius} in the range of from 0.65 to 2.00 millimeters 
The portion of { HEAD ~ the air outlet } opening around the nozzle should have a cross sectional area in the range of from 5 to 15 square millimeters and should be annular in shape with { TAIL ~ a generally uniform radius } in the range of from 0.65 to 2.00 millimeters
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH