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Denox Environmental & Technology Holdings Limited, an investment holding company, designs, develops, manufactures, and sells plate-type DeNOx catalysts, honey-comb DeNOx catalysts, and DeNOx catalysts in the People's Republic of China and internationally. The company sells its plate-type DeNOx catalysts to coal-fired power plants; engineering, procurement, and construction services providers; and boiler manufacturers. It also develops catalysts for diesel-powered vehicles and natural gas-powered vehicles.