straight flight stairs
... straight curb 直立缘石 straight flight stairs 直立楼梯 straight grain 直纹 ...
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栏杆作为结构梁架，使楼梯保持直立，同时两个减震器有助于减轻脚下台阶的震动。
The railings serve as structural beams to keep the staircase upright, while two dampers help to prevent the staircase from vibrating under foot.
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