鋼種：304

應用領域：

解決天下媽媽煩惱小朋友閱讀的問題，改善視角偏低，減少疲勞，讓你工作更有效率。
 

Steel type：304

Application areas：

Solve the problem that mothers worry about children's reading, improve the low viewing angle, reduce fatigue, and make your work more efficient.