spiral stair

常见例句

All of them have separate entrances but are connected by a central spiral stair.
他们分别设置不同的出入口，并通过中部的旋转楼梯加以联系。
Floor plates are easy to navigate with a spiral stair connecting the upper and lower levels.
旋转楼梯连接上下层，便于在楼层之间通行。
Reaching the spiral stair, he raised his eyes absently to the next level and was distracted at once. His own face was looking back at him from the ceiling of the room above.
走到螺旋形楼梯时，他心不在焉地抬眼朝楼上看了看，突然被吸引住了，他自己的面孔正从上层的天花板上朝他看着。