[hannah]

Seems closer to No. 3, 4

For municipal engineering, except underground piping, road, cut/fill, still have:
water resources, storm water management, pumping station, etc.

[QUOTE]Originally posted by 千江月:
我在国内做过城市排水系统工程的设计及质量监理工作(包括污水厂、城市污水管道等)