stair headroom

• 楼梯净空

stair headroom的用法和样例：

例句

1. There is not enough headroom for buses to go under this bridge.
   这座桥梁下面的净空高度不够，公共汽车不能通行。
2. It provides a theoretical basis for super-low headroom large tonnage overhead traveling crane development.
   为柔性化设计理念提供了有力的支持，同时为超低净空大吨位桥式起重机的成功研制奠定了理论基础。