In planning of waterworks, some problem exist such as some basic materials were amiss for not properly preserving, that made any reservoir area altitude system of topography unknow, and made it formidable to plan these sorts of reservoir.

  • 在水利工程规划中,有些基础资料由于保存不当而造成残缺不全,如库区地形图高程系统不明确等,给此类水库规划工作带来一定的难度。

  • 互联网摘选 2025-01-20 13:12:30

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