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