| http://www.w3.org/ns/prov#value | - d wherein ??) the cation-exchange resin is a resin grafted onto strong acid functional groups; the parameter BV denoting the ratio of the volume of raw material to the volume of wet resin in the column, the parameter SV denoting the ratio of the rate of feeding the column to the volume of wet resin in the column, the parameter LV denoting the ratio of the rate of feeding the column to the section
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