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单词 research octane number
释义

Definition of research octane number in English:

research octane number

noun
  • An octane number as determined by the research method of the American Society for Testing and Materials, used chiefly for low engine speeds and loads; abbreviated RON.

Origin

1940s; earliest use found in U.S. Patents.

 
 

Definition of research octane number in US English:

research octane number

noun
  • An octane number as determined by the research method of the American Society for Testing and Materials, used chiefly for low engine speeds and loads; abbreviated RON.

Origin

1940s; earliest use found in U.S. Patents.

 
 
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更新时间:2024/9/22 7:01:24