It looked there like a network of liquid threads which doubtless reached the river by some undergrounddrain.
从这里看起来象是一片水网，无疑地，这些水都从地下泉眼直通到河里。
2
The whole city drainage system program is as follows: rain water wells road, clay and drain well across the street and drainage inspection wells and underground drainage main lines.
市政整体排水系统程序如下：路面雨水→雨水井→沉泥井→过街排水管→排水检查井→地下排水主干线。
3
The feasibility and mechanism analysis of a penetrable pipe for soil base in the field used to irrigate and drain was disccued by mpns of the analyais of present underground irrigation systems.