To avoid interference, {HEAD ~ neither} of these inter segment interfaces uses {TAIL ~ terrestrial cellular operating frequencies} 
uses
To avoid interference , { HEAD ~ neither } of these inter segment interfaces uses { TAIL ~ terrestrial cellular operating frequencies }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL