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When the subway doors are closing, people possible will being clamped if they rush into the carriage. And that may result in security incidents. 『Vurtual Wall』, a security device installed in the subway door, is achieved by plasma laser beam. When subway train doors are closing , 『Vurtual Wall』 will cast a cautionary pattern, to prevent people rush into the carriage, effectively prevent people from being clamped by the subway doors, thus avoiding incidents occur.
Guangzhou Academy of Fine Arts