| http://www.w3.org/ns/prov#value | - The heterogeneous anion exchanger of the present invention has good heat resistance and resistance to bases, and when it is used for an apparatus for producing deionized water by e.g. electrodialysis, deterioration in the deionizing performance such as an increase of the electrical conductivity, will not be observed even after the operation for a long period of time, whereby administration of the
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