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