Visual Talk outdoor, which could realize guarding mechanism in the control center by pickup camera and video collection system;
门口可视对讲，门岗等设置摄像头和视频采集系统，在控制中心上实现可视门禁；
Establishment and implementation of early warning mechanism play an important role in guarding against risks and coping with them when they occur.
建立并实施大学生预警教育机制，对防范和应对风险具有重要的作用。
It introduces the destruction mechanism of steel fiber concrete, which is one kind of better form guarding against splitting, and should attach importance to it in design.
介绍了钢纤维混凝土的破坏机理，认为采用钢纤维混凝土是混凝土防裂效果较好的一种措施，应在设计和施工中给以重视。
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