The numerical result calculated by the formula for estimating the cetane number of distillate fuels from AmericanPetroleumInstitute (API) gravity and midboiling point.
用美国石油学会比重度和中沸点估算馏分燃料十六烷值公式计算得到的数值结果。
2
Crude oil is commonly classified as light, medium or heavy, referring to its gravity as measured on the AmericanPetroleumInstitute (API) Scale.