Why are manholes round?

为什么井盖是圆的？

It involves manholes and endless ladders.

通过人孔和数不尽的梯子。

Close all blind flanges, inspection holes and manholes.

关闭所有盲法兰盖、并检查各个孔和人孔。

Therefore, traffic loads' effect is limited in the lower part of manholes.

因此交通荷载作用下检查井的破坏主要发生在上部结构。

Designed for high temperature requirements rebound parts of manholes, valves.

适应于高温要求回弹部位的人孔，阀门。

The excavation permit does not allow for work inside confined Spaces such as drains manholes etc.

本挖掘许可证不允许用于密闭空间内作业，如关闭人孔等。

In many of the cities and towns in the Stans you have to deal with manholes in the middle of the street.

在城市和城镇中的斯坦斯你必须处理在沙井街道中间有很多。

Gaskets, bolts and nuts for blind nozzles and manholes shall be as specified in Purchaser's drawing or data sheet.

盲设备口及人孔所用的垫片、螺栓及螺母在买方图纸或数据表中指定。

They place thin wooden sticks with red flags near open manholes, but heavy flood waters often wash the markers away.

在口子边上他们会插上木条做的小旗子，但大洪水经常会将这些标志冲走。

Silt removal facilities, channels and manholes should be maintained and the deposited silt and grit should be removed regularly.

淤泥清除设施、渠道及沙井应进行保养，而沉淀的淤泥和砂砾应定期清除。

This allows for more realistic sound during exteriorscenes, and allows for underground plumbing to pipe-in real steam from the manholes.

这样拍摄外景时，音效更加真实，下水道还可以冒出真正的蒸汽。

Residents here are very worried about cholera reaching their area because raw sewage has been overflowing from manholes all over the place.

这里的居民十分担心霍乱到达他们这里，因为大家可以看到，脏水已经从下水口里溢出，弄得到处都是。

When there was a rainstorm, the current drainage pipe could not discharge all the rainwater and spilled the water over through the manholes.

暴雨时，由于雨水排放管太细，雨水来不及排放所以从检修口倒灌回仓库。

Shell as used herein shall mean all pressure holding parts of the vessel in contact with the service fluid, including heads, nozzles, manholes and manhole covers.

这里的壁板指与系统介质接触的所有压力部件，包括封头、设备口、人孔及人孔盖板。

This product factory with reinforcing plate, if you require other standard and non-standard manholes, need to offer standard or drawings, our factory can produce.

本产品出厂时不带加强板，如需其它标准和非标人孔，只需提供标准或图纸，我厂即可生产。

Two 24" manholes shall be installed on each nutshell filter (F-02601A/B), one is on the top of dished head, and the other one is located bellow the media support."

每个核桃过滤器应该有两个24“检修孔（ F – 02601A / B），一个应在碟形头盖上，另一个应位于传动装置支架上。

In this paper, the design points of petroleum chemical equipment such as tower top, side and bottom piping, manholes layout and the nozzle position are introduced briefly.

本文对石油化工装置设计中塔顶、塔体侧面和塔底管道的设计，人孔布置及管口方位的设计要点做简要介绍。

The causes of the problems of the sinking around the manholes and the inconformity of the cross and longitudinal slopes of urban roads are analyzed and some solutions are proposed.

主要针对城市道路检查井周围出现下沉、和路面横纵坡不一致等问题进行了原因分析，并提出了解决办法。

Emergency vent Manhole Cover is a kind of rapid relief-pressure device. Its technical performance, main material and main parts'materialare the same as HXF-HR type breather manholes.

紧急放空人孔是快速泄压装置，其技术性能、主要零部件材料与HXF-HR呼吸人孔相同。

Prevents nozzle problems associated with settling of all competitive below-grade manholes. Non-settling, never-sink manhole. No problem with bellows collapsing unlike competitive products.

使用具有竞争力的检修井能够防止喷管问题的发生。我们生产的检修井永远不会沉降和下沉。也不会产生波纹管塌陷的问题。