The axially compact construction is further facilitated in that the impeller shell axially overlaps {HEAD ~ this counter toothing} of the primary flange to the extent that the impeller shell ends beyond {TAIL ~ the tooth base} of the counter toothing at the primary flange 
The axially compact construction is further facilitated in that the impeller shell axially overlaps { HEAD ~ this counter toothing } of the primary flange to the extent that the impeller shell ends beyond { TAIL ~ the tooth base } of the counter toothing at the primary flange
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH