What security equipment can we access in our daily life?

In our daily life, the places where we can come into contact with security inspection equipment mainly include airports, high-speed trains, trains, cars, subways, scenic spots, museums, large-scale sports competitions, sports meetings, concerts and other public places and places where people gather. The main security equipment we contact are metal detection security doors and hand-held metal detectors to detect human bodies; X-ray security machine, explosive detector and liquid detector used to detect parcels; Under-vehicle comprehensive inspection mirror and under-vehicle high-definition video scanning system are common security inspection equipment.