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河道渠化
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河道渠化
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河道渠化
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river canalization
河道渠化
通过建设闸坝和船闸、升船机等建筑物以及人工裁弯、缩窄河床和固化河岸等工程措施,将天然河流改造成较为规则的渠道,使河流成为互相衔接的梯级,以达到增加通航水深和改善航行条件的目的。
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Tea-picking opera of Eastern Jiangxi Province
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