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