FARIBAULT, Minn., Feb. 6 -- Viratec Thin Films Inc., a manufacturer and supplier of optical thin-film coatings for the display and imaging markets, announced the selection of Liefco Scientific Corp. as the sole representative of Viratec's line of imaging products. Liefco Scientific's territory will cover Taiwan, China and Hong Kong.Liefco is an importer and manufacturer specializing in mirror, glass and optical glass fabrication for Asian display and imaging manufacturers.