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