canal policy
管政策
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The optimum policy of conjunctive operation of canal and well can be widely used in irrigation engineering management of the Hetao irrigation district.
渠井联合运用的优化决策，可广泛应用于河套引黄灌区灌排工程配套及管理之中。
youdao
But root-canal economics also does not constitute optimal economic policy.
WSJ: Kevin W. Warsh: The New Malaise and How to End It
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