What does XX-Hvy stand for?

MLA style: "XX-Hvy." Acronym Finder . 2012. AcronymFinder.com 12 Feb. 2012 <a href="http://www.acronymfinder.com/Double-Extra-Heavy-(oilfield-technology)-(XX_Hvy).html">http://www.acronymfinder.com/Double-Extra-Heavy-(oilfield-technology)-(XX_Hvy).html
Chicago style: Acronym Finder . S.v. "XX-Hvy." Retrieved February 12 2012 from <a href="http://www.acronymfinder.com/Double-Extra-Heavy-(oilfield-technology)-(XX_Hvy).html">http://www.acronymfinder.com/Double-Extra-Heavy-(oilfield-technology)-(XX_Hvy).html
APA style: XX-Hvy. (n.d.) Acronym Finder. (2012). Retrieved February 12 2012 from <a href="http://www.acronymfinder.com/Double-Extra-Heavy-(oilfield-technology)-(XX_Hvy).html">http://www.acronymfinder.com/Double-Extra-Heavy-(oilfield-technology)-(XX_Hvy).html

Double Extra Heavy (oilfield technology)

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