Stainlesssteelbolts and nuts shall be tightened on manhole covers.
人孔盖使用不锈钢螺栓和螺母拧紧。
2
Service of all internal components shall be through a single access cover secured with stainlesssteelbolts.
所有内部构件的维修都可以通过唯一的检修盖进行，这个检修盖采用不锈钢螺栓固定。
3
Hinges shall be stainlesssteel with tamper proof stainlesssteelbolts and nuts, and shall be removable for maintenance after the access door is cast in place.