{HEAD ~ The advantage} of using {TAIL ~ the cable} is that the reference junction can, as the need arises, be flexibly connected to more than one type of reference unit 
of using
{ HEAD ~ The advantage } of using { TAIL ~ the cable } is that the reference junction can , as the need arises , be flexibly connected to more than one type of reference unit
HEAD HEAD HEAD HEAD HEAD HEAD REL REL 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