“　　　　古代涵管”的概念、定义、翻译、参考文献-科学参考

单词	古代涵管
释义	古代涵管 Encyclopedia 理学　　　　古代涵管释 Culverts in ancient China　　　　古代涵管古代又称瓦窦、涵洞，修在塘堰或渠道的堤岸中，用于向农田放水；建于大江大河、湖泊的堤岸中，用于泄水、淤灌等；或建于古城城墙中，用于城市供排水。涵洞可为开敞式，也可设闸门节制。
随便看	symmetric configuration symmetric connection symmetric continuous group symmetric coordinate symmetric coupling symmetric covariant tensor symmetric cryptographic algorithm symmetric cryptosystem symmetric cubic graph symmetric derivative symmetric derived number symmetric design symmetric determinant symmetric difference symmetric difference metric symmetric difference of events symmetric difference of graphs symmetric difference of sets symmetric differential form symmetric distance function symmetric distribution symmetric distribution function symmetric domain symmetric element symmetric encryption technique

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