A device 9 wherein {HEAD ~ said radial inlet spout} has a curved side wall along which an outer edge of said guide vane moves upon rotation of {TAIL ~ said guide vane} 
A device 9 wherein { HEAD ~ said radial inlet spout } has a curved side wall along which an outer edge of said guide vane moves upon rotation of { TAIL ~ said guide vane }
OTH OTH OTH OTH HEAD 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 TAIL TAIL TAIL TAIL TAIL TAIL TAIL