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