单词：drain-pipes
drain-pipes的用法和样例：
例句
- To prevent water damage, the valve must be properly connected to a discharge line which terminates at an adequate drain.为了防止水的破坏，这些阀门必须与排水管道连接，以便能够将水排到适当的排水口。
- The city was even equipped with a drainage system, for many clay pipes were found beneath its narrow streets.城里甚至还敷设了排水系统，因为在狭窄的街道底下发现了许许多多陶土制作的排水管道。
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