1·We have been used to calculate the diameter of ringed piping according to ramiform piping, then it result in the bigger diameter and wasting of investment.
长期以来，习惯环状管网管径按枝状管网计算，管径偏大，造成浪费。
2·According to action principle, extinguishing process and efficiency of the sprinkler systems, it is put forward that the ringed arrangements replace the ramiform arrangements.
根据自喷系统的作用原理、灭火过程和效率，提出用环状管网代替目前广泛采用的枝状管网的观点。