Reference numeral 38 denotes an upper layer feed arm having {HEAD ~ the bifurcated base} pivoted to {TAIL ~ the lower end} of the support arm 36 
pivoted to
Reference numeral 38 denotes an upper layer feed arm having { HEAD ~ the bifurcated base } pivoted to { TAIL ~ the lower end } of the support arm 36
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH