The air purifier has following merits: small volume, low cost, high purification efficiency and removing multi - contaminations.

该净化器具有体积小, 成本低, 效率高等特点.

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The result shows that the purification efficiency is higher under current operation co - current operation.

结果表明:逆流操作的净化效率高于顺流,气(液)体流量对出、进口气(液)体温差有较大影响.

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The effect of various ecological factor on purification efficiency of water plants ate discussed.

并讨论了各种生态因子对水生植物净化效率的影响.

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This paper studied the purification efficiency of wastewater in the static experiment by Oenanthe javanica.

通过静态实验研究了水芹菜对污水的净化能力.

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