improvements of hydraulic engineering construction
...nstructions and Distributions for Resettlement o 20 我国高坝建设进展 Improvements of Hydraulic Engineering Construction 20 山东省干旱成因及对策 Reasons of Drought in Shandong Province and Countermeasures ..
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improvements of hydraulic engineering construction
水利工程建设的改进
以上为机器翻译结果，长、整句建议使用 人工翻译 。