the main principle of selective withdrawing is analyzed and the layout of march-past intake and eclipsed form intake are introduced on the basis of stratified flow theory.
依据分层流理论,阐述了选择取水的基本原理,分析了分列式和重叠式取排水口的工程布置原则。
then the two heads of state and their spouses stepped on the inspection stage and watched the march-past of the motorcycle guards, infantry and cavalry.