地下排水 [建] underdrainage ; subdrain ; subsurface drainage
地下排水沟 subsoil drain ; mole drain ; blind drain
地下排水管 underdrain ; [建] subsoil drain
地下排渠 blind drain
地下排水管道 subsoil drain
地下排水系统 underdrainage system ; Subsurface drainage system
地下排水材料 subsurface drainage materials
下排污 Lower drain
地下排水道 [建] subdrain
下排式排种器 bottom delivery feed
城市规划师决定建一个地下排水系统。
The city planner decided to build an underground drainage system.
在树下排队的孩子们是谁？
Who are the children under the tree that are waiting in line?
在地中海区域的早期文明中，拱形结构主要被运用在地下排水管上，但在地上建筑中首先发展并广泛使用拱门的是罗马人。
The arch was used by the early cultures of the Mediterranean area chiefly for underground drains, but it was the Romans who first developed and used the arch extensively in aboveground structures.
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