|
|
|
|
|
Xiaoyu Ma, Wei Xi, Zuhao Chen, Han Hao and Jizhong Zhao
Elevators have become a kind of indispensable facility for everyday life, which bring people both convenience and safety hazards. Specifically in the household environment, an elevator?s lifespan is expected to be more than 20 years. An appropriate and r...
ver más
|
|
|
|
|