The existing urban drainage system is hereby introduced, including the combined flow and separate flow systems.

阐述了现有城镇排水系统的排水体制，并着重介绍了合流制排水体制和分流制排水体制。

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And not wimpy Mississippi-scale floods, either: just one of them could equal the combined flow of all the planet's rivers.

它们不似密西西比河那般柔弱无力，仅仅其中的一条洪流就相当于地球上所有河流的总和。

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The experiment has proven that, after parameter optimization, the valve combined flow region has been expanded and the min. steering flow increased resulting in obvious energy-saving effect.

试验证明，参数优化后，阀的合流范围拓宽，最小转向流量提高，并有明显的节能效果。

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The collection manifold, which allows oil flows to be separated or combined without interrupting the flow, appears to have been damaged by an explosion.

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