读报
登录注册网站首页
 

CAMPUS LIFE

A moving invention

作者:TEENS
Aa
  • -   
  •    +
Wang Guanxi from Beijing invents a device that helps the elderly climb stairs. provided to TEENS

 

A student earns a national patent for his helpful device 

点击阅读全文
联系我们  |  诚聘英才  |  关于我们  |  版权声明
© i21st.cn   京ICP备2024066071号-1
 
选择报纸
选择报纸
关闭