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GB1217171A
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Ion exchange unit and method of regeneration
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Improvements in or relating to the treatment of water
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GB989131A
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Improvements in or relating to electrodialysis
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A method of packing a receptacle with comminuted material
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GB913219A
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Improvements in or relating to an electro-dialysis apparatus
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Apparatus for breaking a conducting-liquid electric current flow path
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Improvements in or relating to an electrodialysis apparatus
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Improvements in or relating to a method of water purification
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GB822802A
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Improvements relating to a method of and apparatus for introducing a known quantity of a first liquid from a vessel into a stream of a second liquid
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Improvements in or relating to periodic sampling and testing apparatus
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Improvements in ion-exchange processes for the treatment of water
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An improved method of softening water
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GB586972A
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Improvements in or relating to water-softening plant
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CA600789A
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Method of and apparatus for removing organic material from water
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