In a design of reconstructing a stair into an escalator, the headroom of the escalator should be thought over when the escalator is decided to be disposed in cross or parallel.
在对某楼梯改造为自动扶梯的工程设计中，在考虑选用交叉布置还是平行布置时，应满足扶梯净空等使用要求。
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