What does SP-GR stand for?

MLA style: "SP-GR." Acronym Finder . 2013. AcronymFinder.com 20 May. 2013 http://www.acronymfinder.com/Specific-Gravity-(jet-fuel)-(SP_GR).html
Chicago style: Acronym Finder . S.v. "SP-GR." Retrieved May 20 2013 from http://www.acronymfinder.com/Specific-Gravity-(jet-fuel)-(SP_GR).html
APA style: SP-GR. (n.d.) Acronym Finder. (2013). Retrieved May 20 2013 from http://www.acronymfinder.com/Specific-Gravity-(jet-fuel)-(SP_GR).html

Specific Gravity (jet fuel)

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