looping pipe meaning in Chinese

管式围盘
环管
环形管

The water - proof and drainage system within the tunnel has adopted the comprehensive treatment project of the combined linings and setting the pvc pellicle in the middle , the connection of the longitudinal , loop pipes and the rubber - sealing belt
洞内防排水采用复合式衬砌中间设聚氯乙烯薄膜结合纵向、环向盲管及橡胶止水带的综合治理方案。
In the optimal design of loop pipe networks , an improved genetic algorithm ( ipga ) based on integer coding is introduced in this paper . not only the problem of coding redundancy is avoided , but also the practicability and computation efficiency are greatly improved . also the optimal calibre combination scheme can be got within a larger solution space and the goal of less investment is realized
应用基于整数编码的改进遗传算法进行环状管网管径优化设计，既可避免编码冗余问题，又可提高算法的实用性和计算效率，并能在较大解空间范围内获得最优管径组合方案以实现尽可能小的管网投资。