In the illustration of FIG 1, {HEAD ~ the adapter blocks} are arranged for {TAIL ~ compatibility} with rod and connector subassemblies incorporating a specific size of rod 
are arranged for
In the illustration of FIG 1 , { HEAD ~ the adapter blocks } are arranged for { TAIL ~ compatibility } with rod and connector subassemblies incorporating a specific size of rod
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH