lifter roof

例句：

1. 1. The lifter roofof the skyscraper is amarvel of engineering.
   这座摩天大楼的起重机屋顶是工程学的奇迹。
2. 2. The lifterroof provides excellent ventilation for thebuilding.
   起重机屋顶为建筑提供了极好的通风。
3. 3. Thelifter roof was designed to withstandheavy snowfalls.
   起重机屋顶被设计来承受大雪。