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emergency staircase 安全樓梯。

emergency treatment

Nearly all those in floors below the impact survived , however , while all but a handful of those above died - because the crashed planes severed all lifts and each tower ' s three emergency staircases 在飛機撞擊部位上面樓層工作的人員中,除了一小部分外,大都沒能逃脫厄運。飛機的猛烈撞擊不僅切斷了電梯的運行,而且還使每棟塔樓中的3條逃生通道被阻斷。

Emergency ladder emergency staircase 室內逃生梯

Or used the emergency staircase 或者使用緊急通道