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C20

C20 or C-20 may refer to: Science and technologyCarbon-20 (C-20 or C), an isotope of carbonC20, the smallest possible fullerene (a carbon molecule)C20 (engineering), a mix of concrete that has a compressive strength of 20 newtons per square millimeterMalignant neoplasm of rectum, a type of colorectal cancer (ICD-10 code: C20)Caldwell 20 or North America Nebula, an emission nebula in the constellation CygnusEicosane (USA) or n-icosane (international), CH3-(CH2)18-CH3 or C20H42(s), a linear (straight-chain) alkaneIEC 60320 C20, a polarised, three pole socket electrical connectorC20 (Capacity, 20 hours), C100 (100 hours), battery capacityTransportation and militaryColt Canada C20 DMR, a Canadian designated marksman rifleHMS C20, a 1910 British C-class submarineSauber C20, a 2001 racing carSL C20, a type of rolling stock used in the Stockholm metroHMS Tiger (C20), a cruiser of the Royal NavyC-20, the proposed in-service designation of the Fokker F-32C-20A/B/C/D/E, variants of the Gulfstream IIIC-20F/G/H/J, variants of the Gulfstream IVC20 is a version of the Allison Model 250 aircraft engineOther usesBill C-20, the Canadian Clarity ActOMX Copenhagen 20, Denmark's primary stock market indexKing's Pawn Game, a chess opening (Encyclopaedia of Chess Openings code: C20)The Twentieth Century Society, a British charity which campaigns for the preservation of architectural heritage from 1914 onwardsC20 Cities, now expanded to the C40 Cities Climate Leadership GroupDr.

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