您要查找的是不是：
- adjustable manhole covers 可调式井框盖
- Here's the question: Why are manhole covers round? 这个问题是：为什么下水道井盖都是圆的?
- Cast iron manhole covers are the best alternatives. 是铸铁井盖最理想的替代品。
- Other areas shall use “B” type manhole covers. 其余的人孔盖为B型人孔盖。
- Or the manhole cover outside your apartment? 还是你公寓外面的下水井盖?
- Why are manhole cover round in shape? 点解下水道的盖是圆形的?
- Please move the manhole cover away. 请将人孔盖移开。
- Manhole covers are also gaining popularity as lamps. 人孔盖甚至还被改造成灯。
- There’s a thin, lightning bolt-shaped crack next to a rusting manhole cover and I adjust my gait to get my right foot to step on it. 紧挨着一个生锈的井盖有一条细细的闪电装的裂缝，我调整了一下步伐，好让右脚踩上去。
- Say, Doc, did a guard go by here with a manhole cover tool? 嘿，博士，有警卫会带著通道盖子工具经过这边吗?
- We've had a survey made of every manhole cover In the camp. 我们勘查了所有在营区里面的下水道入口。
- Fittings, Cast Iron Manhole Cover, Hardware& Building Materials. 球墨管;生铁管及配件;阴沟盖极;钢管及五金建筑材料.
- The testing and examination of doors, windows, manhole covers, hatches. 门、窗、人孔盖、舱口盖的检验和试验。
- Fittings, Cast Iron Manhole Cover, Hardware &Building Materials. 球墨管;生铁管及配件;阴沟盖极;钢管及五金建筑材料.
- Oil or water tanks shall have oil tight or watertight manhole covers. 油柜或水柜应该有相应的油密或水密人孔盖.
- 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 people authorized to open manhole covers could easily be trained to do it safely. 专业人员经过简单的培训就可以做到安全的打开井盖。
- Inspect the convenience and reliability of all kinds of doors、windows、manhole covers、hatch .Inspect the closing of louver of funnel. 检查各种门、窗、人孔盖、烟囱百叶窗、舱口盖操作的便利性和可靠性。检测烟囱百叶窗的闭合性。
- I want a full check on all the other manhole covers! Report back to me as soon as this Is done! 我要检查全部的下水道入口盖子！尽快完成后向我报告！
- Make a collection of interesting manhole covers, hands, feet, mustaches, alphabet letters. 检修孔的盖、手、脚、胡子、字母表，都能拍上一个系列。还有比如钢琴的里面啊什么的。
