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