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