What does OPTR stand for?

MLA style: "OPTR." Acronym Finder . 2012. AcronymFinder.com 2 Jun. 2012 <a href="http://www.acronymfinder.com/Orifice-Pulse-Tube-Refrigerator-(OPTR).html">http://www.acronymfinder.com/Orifice-Pulse-Tube-Refrigerator-(OPTR).html
Chicago style: Acronym Finder . S.v. "OPTR." Retrieved June 2 2012 from <a href="http://www.acronymfinder.com/Orifice-Pulse-Tube-Refrigerator-(OPTR).html">http://www.acronymfinder.com/Orifice-Pulse-Tube-Refrigerator-(OPTR).html
APA style: OPTR. (n.d.) Acronym Finder. (2012). Retrieved June 2 2012 from <a href="http://www.acronymfinder.com/Orifice-Pulse-Tube-Refrigerator-(OPTR).html">http://www.acronymfinder.com/Orifice-Pulse-Tube-Refrigerator-(OPTR).html

Orifice Pulse Tube Refrigerator

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