... rise and run ratio 踏步级高与踏步宽比 rise of a flight梯段高度 riser 上升管，浇冒口，氯门，溢水口，冒口；升降器，上升管道；挡步板；立管 ...
双语例句
1
Chinese cities are densely populated and a lot of people live in pigeonholes in high-rise apartment buildings. Usually, over 100 households share a couple of elevators or the same flight of stairs.