4个生产层理论
four production levels theory
NAU服务管理层
NAU services manager layer
TMN管理层模型
Management layer model of TMN
板状交错层理
tabular cross-stratification
tabular cross-tratification
tabular cross-bedding
薄边界层理论
thin boundary layer theory
薄层理互层
thin-bedded alternation of strata