Stainless steel bolts and nuts shall be tightened on manhole covers.

人孔盖使用不锈钢螺栓和螺母拧紧。

The glass walls are connected to the beams, and to the glass floor, with stainless-steel bolts.

玻璃墙和玻璃地板通过不锈钢螺栓相连接并固定在梁上。