“古代北京城水利”的概念、定义、翻译、参考文献-科学参考

单词	古代北京城水利
释义	古代北京城水利 Encyclopedia 工学〔中国古代城市水利〕释 water conservancy of ancient Beijing city古代北京城水利北京位于永定河与潮白河洪积冲积扇脊部，这两条河都距城区较远流过，引用存在许多困难。北京降水量年内分布很不均匀，总径流量偏少，自古就是缺水地区。开发利用永定河与潮白河水资源并防止其洪水灾害，是古代北京城水利的重点。
随便看	flow part form of multi-stage axial flow compressors flow passage of steam turbine flow pattern flow pattern identification flow pattern of river water flow patterns in porous media flow patterns of liquid-gas two-phase flow flow polynomial flow potential flow pressure drop flow primary standard flow principle flow problem flow quantity flow rate flow rate logging device flow rate measurement method based on velocity and area flow ratio flow reactor flow regime flow regulatory systems flow relation flow resistance flow resistance in fluvial channels flow sensor

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