{TAIL ~ The bifurcated upper end} of the vertical leg of {HEAD ~ the support arm} is connected to the upper end of the feed arm 22 by means of an upper layer feed rod 37 
{ TAIL ~ The bifurcated upper end } of the vertical leg of { HEAD ~ the support arm } is connected to the upper end of the feed arm 22 by means of an upper layer feed rod 37
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH