Each of the cooling shoes includes an air expansion chamber communicating through a shoe inlet when in {HEAD ~ use} with {TAIL ~ a supply} of air under pressure 
with
Each of the cooling shoes includes an air expansion chamber communicating through a shoe inlet when in { HEAD ~ use } with { TAIL ~ a supply } of air under pressure
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH