优选法 (习惯称为 0 .618法 )是一项用较少的试验次数 ,较快地找出最佳试验结果的科学方法 ,在某给水管道工程的试压中应用此方法 ,获得了明显的效果。某城市大口径给水管地处城郊结合部 ,由于某种原因 ,已完成的ＤＮ2 2 0 0的柔性接口直埋球磨铸铁管 (全长 10 0 0ｍ)未试压先? The preferred method (commonly referred to as the 0.618 method) is a scientific method that finds out the best test results quickly with fewer test times. This method is applied to the test of a water supply pipeline project to obtain the obvious effect. A city of large diameter water supply pipe is located in the suburbs of the junction, for some reason, has completed the DN220 flexible interface direct buried ball mill cast iron pipe (length of 100m)