foundation on wells meaning in Chinese

沉井基础
井筒基础

( 2 ) . wbs is an important basis in project management and a necessary clue of activity chain . taking the aim and function of the srttep plan as a starting point in consideration , with the introduction of the prearranging ideas such as concept design , detailed design and rolling design , the thesis puts forward project working structure resolving method based on wbs three - class model , thus realizing the working structure resolution by using gradually - deepened gradation model and laying foundation on better plan , staff disposition and budget plan
( 2 )项目工作结构分解( wbs )是项目管理的重要依据和活动链接的必要线索，本文从川塔施建工程项目工作计划的目的和作用出发，引入概念设计、详细设计、滚动设计的事前规划思想，提出了基于wbs三级模型的项目工作结构划分方法，利用逐级深入的层次模型实现项目的工作结构分解，为项目进一步的进度计划、人员分配、预算计划奠定了坚实的基础。