单词 | dichlorodifluoromethane |
释义 | > as lemmasdichlorodifluoromethane dichlorodifluoromethane n. Brit. /dʌɪˌklɔːrə(ʊ)dʌɪˌflʊərə(ʊ)ˈmiːθeɪn/ , /dʌɪˌklɔːrə(ʊ)dʌɪˌflɔːrə(ʊ)ˈmiːθeɪn/ , U.S. /daɪˈˌklɔroʊdaɪˌflʊroʊˈmɛˌθeɪn/ , /daɪˈˌklɔroʊdaɪˌflɔroʊˈmɛˌθeɪn/ an easily liquefied, unreactive gas used (esp. formerly) as a refrigerant and aerosol propellant.Formula: CCl2F2.ΚΠ 1930 G. W. Jones & G. St J. Perrott (U. S. Bureau Mines) (title) Extinction of methane flames by dichloro-difluoro-methane. 1976 Science 8 Oct. 171/1 Trichlorofluoromethane and dichlorodifluoromethane (CFCl3 and CF2Cl2, the halocarbons implicated in ozone damage). 2006 Akron (Ohio) Beacon Jrnl. (Nexis) 2 Sept. b3 Downwind samples just off the landfill showed levels of the chemicals ranging from acetone at 6.4 parts per billion to dichlorodifluoromethane at 0.55 parts per billion. < as lemmas |
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