drain-pipes的用法和樣例：
例句
- To prevent water damage, the valve must be properly connected to a discharge line which terminates at an adequate drain.
為了防止水的破壞，這些閥門必須與排水管道連接，以便能夠將水排到適當的排水口。 - The city was even equipped with a drainage system, for many clay pipes were found beneath its narrow streets.
城裡甚至還敷設了排水系統，因為在狹窄的街道底下發現了許許多多陶土製作的排水管道。
