What is the specification of subway security screening machine lead curtain

Subway screening machine lead curtain specifications are 1 meter long, 0.6 meters wide. According to the query relevant public information shows that the subway security machine by 1 meter long, 0.6 meters wide lead curtain and detector composition, when passengers carry the goods into the security machine, the lead curtain will be automatically closed, the detector will detect whether the passenger is carrying prohibited items, there are prohibited items the lead curtain will automatically stop closing, issued an alarm.