{TAIL ~ A guide disc} with {HEAD ~ a contour} corresponding to the impeller is further arranged between impeller and cover disc 
{ TAIL ~ A guide disc } with { HEAD ~ a contour } corresponding to the impeller is further arranged between impeller and cover disc
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH