| 11. | Their main product will be salt used for de-icing roads, human consumption, water softening and agriculture.
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| 12. | Before running for office, Blair worked in her parents'apple orchard and for their water softening company.
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| 13. | That is, they bind tightly to di-and trivalent metal ions, which is useful in water softening.
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| 14. | The most common case is water softening consisting of removal of mercury, arsenic and many others.
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| 15. | "' Water softening "'is the removal of calcium, magnesium, and certain other metal cations in hard water.
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| 16. | Wherever water hardness is a concern, water softening is commonly used to reduce hard water's adverse effects.
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| 17. | At this stage the turntable and ash pit were still evident as was the 1939 water softening plant.
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| 18. | These systems do not fall within the term " water softening " but rather " water conditioning ".
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| 19. | In 1898 a water softening plant was installed, the first of its kind on the Great Central Railway.
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| 20. | "' Ion exchange "'has long been used as a water softening process, although usually on a single-home basis.
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