. . . . "405 line system" . . "405-line television" . . . . . . . . . . . . . "405 lines" . "405" . "technical reasons" . . . . "Marconi-EMI system" . . . . "405-line television service" . "405-line television system" . "EMI system" . . . . "British 405-line system" . . . "405-line" . . "Marconi/EMI camera" . "405 line" . . . . . . . "405-line broadcasting" . "405 TV Trials" . "405-line television system" . "VHF terrestrial TV" . . . . "405-lines" . . "405 line service" . . "high-definition television" . "405-line system" . . . . "television standard" .