| http://www.w3.org/ns/prov#value | - ing, fabrication, or repair operation.(b) The exemption includes:(1) chemicals, catalysts, and other materials that are used during a manufacturing, processing, or fabrication operation to produce or induce a chemical or physical change, to remove impurities, or to make the product more marketable;(2) semiconductor fabrication cleanrooms and equipment; and(3) pharmaceutical biotechnology clean
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