a clause in a contract that provides for an increase or a decrease in wages or prices or benefits etc. depending on certain conditions (as a change in the cost of living index)
a stairway whose steps move continuously on a circulating belt
例句
用作名词(n.)
Take the escalator over there down one floor.在那边下一层楼后乘自动扶梯。
Appointed mechanical engineering for drive,skirting ,cover design and escalator nonstandard design.期间作为机械工程师主要负责自动扶梯传动系统与围裙板，内外盖板的设计。
