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