explosive trace detection(n = noun.artifact) etd - 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;
is a kind of system
bursting explosive, detection, disrupting explosive, explosive, explosive charge, explosive compound, explosive detection system, explosive device, explosive mixture, explosive unit, favier explosive, fuel-air explosive, high explosive, improvised explosive device, impulse explosive, low explosive, memory trace, plastic explosive, propellant explosive, radio detection and ranging, ship-towed long-range acoustic detection system, signal detection, trace, trace detector, trace element, trace program