"0"^^ . . "a system for screening luggage in airports; an agent passes a swab around or inside luggage and then runs the swab through a machine that can detect trace amounts of explosives"@en-us . "0"^^ . . . "explosive trace detection"@en-us . . . . "103305953"^^ . "ETD"@en-us . . "103185936"@en-us . . . . "03305953-n"^^ . "explosive trace detection"^^ . .