SEIL backpack by Lee Myung Su USES LED lights to display traffic signals.

(韩国设计师，官网在此)设计的SEIL背包利用LED灯来显示交通信号。

Meanwhile, analyze the experimental result, do attack experiment use natural soil, air-dry soil, stoving soil and preparation seil, observe the difference.

同时，对试验结果进行了分析，土样采用天然土、风干土、烘干土、制备土进行击实试验，以观察试验结果的区别。