In the hollow shaft embodiment one cooling shoe chamber has an outlet in {TAIL ~ communication} with the nozzle via {HEAD ~ the shaft} 
In the hollow shaft embodiment one cooling shoe chamber has an outlet in { TAIL ~ communication } with the nozzle via { HEAD ~ the shaft }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD