{HEAD ~ The fixing} of the stirrer blades 15 on {TAIL ~ the rotation axle} 16 is improved by a fixing piece 17 
on
{ HEAD ~ The fixing } of the stirrer blades 15 on { TAIL ~ the rotation axle } 16 is improved by a fixing piece 17
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH