roofn.屋顶;顶vt.覆盖;给 ... 覆以屋顶
roof fire屋顶火
roof arch拱形屋顶
roof step顶板台阶下沉
roof jack顶板螺旋千斤顶
roof pole屋顶天线杆
roof hook屋顶钩
roof tree栋梁
roof vent屋顶排气口
roof slab屋顶板
roof line屋顶线