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单词 cetane number
释义

WordReference Random House Unabridged Dictionary of American English © 2024
cetane num′ber, 
  1. Chemistrya measure of the ignition quality of a diesel engine fuel by comparison with various mixtures in which the alpha form of methylnaphthalene is given a standard value of 0 and cetane is given a standard value of 100. Also called cetane rat′ing. 
  • 1930–35

Collins Concise English Dictionary © HarperCollins Publishers::
cetane number n
  1. a measure of the quality of a diesel fuel expressed as the percentage of cetane in a mixture of cetane and 1-methylnapthalene of the same quality as the given fuel
    Also called: cetane rating
    Compare octane number
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