Water purification systems may follow the initial pretreatment steps in various sequences depending on the characteristics of the water and the design of the system.

水纯化系统可能跟随在初始的预处理步骤后面，根据水规格参数的不同有多种顺序和系统设计。

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But its main focus now is the clever stuff: specialty chemicals that are used for everything from water-purification systems to solar roof tiles.

但是它现在关注的焦点是智能材料：能应用于从净化水系统到太阳房顶的瓦片的各种用途的专用化学品。

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Such a system could work in concert with water purification and testing systems.

这种新系统可以用于水体检测和净化系统。

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From water purification systems and biohazard sensors to efficient energy systems and nutritional supplements in baby food, the spinoffs from space technology are myriad.

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Although the Pall Corporation ( NYSE:PLL), a company that creates water purification systems, did not create the spill, they are responsible for cleaning it up.

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The company vows to double its revenues from 17 clean-technology businesses, ranging from renewable energy and hydrogen fuel cells, to water filtration and purification systems, to cleaner aircraft and locomotive engines.

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