The axle unit 20 is located within {TAIL ~ the two flanges} 13 and {HEAD ~ the hollow tube} 14 
The axle unit 20 is located within { TAIL ~ the two flanges } 13 and { HEAD ~ the hollow tube } 14
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH