A steel cylinder nearly 3 meter tall but weighs ninety tons, surrounded by additional 140-ton steel and concrete frame.

一个近 3 米高但重 90 吨的钢柱，周围被 140 吨的钢筋混凝土框架包裹。

There are 63 video cameras providing 24-hour video surveillance and the entire perimeter can be shut off with steel cylinders that will block any vehicles from getting in or from leaving.

这里有 63 个摄像头，进行 24 小时的视频监控，整个周边区域可以用钢柱关闭，阻止任何车辆进出。