In the preferred embodiment, the rotor carries {HEAD ~ three blades} in {TAIL ~ each row}, as does the stator 
in
In the preferred embodiment , the rotor carries { HEAD ~ three blades } in { TAIL ~ each row } , as does the stator
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH