occupied story是什么意思

用法例句

For high commercial buildings,a fire has such characteristics the as easy occurrence,quick spread difficult extinguishing.

文章对高层商用楼的防火应当采取以管理为主的防火预案与以技术为主的应急措施相结合的原则进行了具体的设计 ,提出建立四级防护体系和四节灭火系统的方法 ,可用作高层商用楼防火工作的参