纳滤是介于反渗透和超滤之间的一种膜分离技术，是国内外研究的热点。
Nanofiltration is a kind of pressure-driven membrane-separation technique similar to reverse osmosis filtration and ultrafiltration. It has become a hot topic of researches all over the world.
目的：我们采用先进的自动控制技术、膜分离技术、精滤、双级反渗透和紫外消毒系统研制出全自动封闭式医用纯水制备系统。
Objective We adopted techniques of the modern membrane separation and exact filtration and the technology of reserve osmosis solves difficulty of medicinal water.
GE建设了两套反渗透过滤系统，目前可以为工厂的冷却系统和锅炉装置提供净化水源。
GE built two reverse osmosis filtration systems that now provide clean water for the facility's cooling system and boiler plant.
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