At one end of the hollow shaft an impeller is fastened which has vanes projecting into {TAIL ~ an inlet chamber} and which is firmly connected via {HEAD ~ axial bridges} to a cover disc 
At one end of the hollow shaft an impeller is fastened which has vanes projecting into { TAIL ~ an inlet chamber } and which is firmly connected via { HEAD ~ axial bridges } to a cover disc
OTH OTH OTH 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 HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH