碳分布 meaning in English

carbon distribution

05 . 02 carbon distribution and structural group analysis of petroleum oils by the n - d - m method , method of test for
用n - d - m法对石油进行碳分布和结构组分析的试验方法
Test method for calculation of carbon distribution and strutural group analysis of petroleum oils by the n - d - m method
石油馏分的碳分布和结构族组成计算方法n - d - m法
Standard test method for calculation of carbon distribution and structural group analysis of petroleum oils by the n - d - m method
N - d - m法计算石油中碳分布及结构基团分析的标准试验方法