{HEAD ~ The body} and the shroud define {TAIL ~ an impeller chamber} including a radially inner surface and a radially outer surface 
{ HEAD ~ The body } and the shroud define { TAIL ~ an impeller chamber } including a radially inner surface and a radially outer surface
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH