We're 500 feet from the main sewer line.

我们距离污水管的主干道只有500英尺了。

The cholera epidemic began in Haiti near a camp for UN soldiers where there were leaking sewage pipes.

海地这场霍乱开始在联合国士兵营地附近，那里出现污水管泄露现象。

For this reason, Iranian civil engineers are interested in using it in structures as diverse as dams and sewage pipes and are working on improving it.

根据这个特点，伊朗的UHPC用到从修建水坝到铺设污水管的各各 领域，并且不断地对其性能进行改进。

(b)Drains shall be of adequate size and, where connected directly to a sewer, shall be provided with an air break or other mechanical device to prevent back-siphonage.

(b) 排水设备有足够的尺寸，在直连污水管的地方安装防止倒灌的空气隔断或其他机械装置。

By the late 1880s, the city had become too dense with buildings, sewers, and electric cables for the " cut and cover" technique, so a new system had to be devised.

十九世纪八十年代末，伦敦因楼房、污水管、和电缆外露而变得过于拥挤，原因是随挖随填技术，因此，人们需要设计新的设备。