Identification monitoring systems have been widely installed in Niujie Street, Xicheng District, even in 46 underground spaces. The system is connected to wireless door magnetic sensors that are triggered by activity ...Identification monitoring systems have been widely installed in Niujie Street, Xicheng District, even in 46 underground spaces. The system is connected to wireless door magnetic sensors that are triggered by activity around doors and windows,展开更多
文摘Identification monitoring systems have been widely installed in Niujie Street, Xicheng District, even in 46 underground spaces. The system is connected to wireless door magnetic sensors that are triggered by activity around doors and windows,
