The headrest 3 illustrated is made of a metal plate channel shaped in {HEAD ~ section} taken along {TAIL ~ the line III III} in FIG 2 
taken along
The headrest 3 illustrated is made of a metal plate channel shaped in { HEAD ~ section } taken along { TAIL ~ the line III III } in FIG 2
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH