标签:security fence
Posted in 业界观察
Security in History: June 25, 1867 Barbed Wire
K.T. Sima 2022年6月25日
June 25, 1867 – USA Lucien B. Smith of Kent, Ohio, patented barbed wire (or barb wire). Barbed…
10 Life-Saving Tips in a Flood (in 300 words)
2023-08-04
Before a flood 1. Stay informed Make sur...