This ladder is for use in dispersing residents during fire, earthquake and air attack.

高楼疏散安全梯为火灾、地震、空袭疏散居民之用。

youdao

This ladder is for use in dispersing residents during fire, earthquake and air attack.

高楼疏散安全梯为火灾、地震、空袭疏散居民之用。

youdao