After {HEAD ~ completion} of {TAIL ~ the testing}, the entire unit, which would typically be on the order of 60 feet long, would be sealed and transported to the installation site, where adjacent sections would be secured together to form the complete transmission line 
of
After { HEAD ~ completion } of { TAIL ~ the testing } , the entire unit , which would typically be on the order of 60 feet long , would be sealed and transported to the installation site , where adjacent sections would be secured together to form the complete transmission line
OTH HEAD HEAD HEAD HEAD HEAD 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH