mass transfer number质量传递数
Mass electron number Nc质量电子数
Mass and number distribution质量和粒数分布
mass-number conservation质量数守恒
atomic c mass number原子质量数
even-mass number偶质量数
mass transfer Fourier number质传傅立叶数
mass transfer Stanton number质传斯坦顿数
N（名词） the total number of neutrons and protons in the nucleus of a particular atom (原子)质量数 ( symbol: Also called nucleon number)