最全面PE给水管施工安装手册(乐洁) PE给水管施工安装手册目??? 录1前言…………………………………………………………42施工时基本作业……………………………………………42.1挖基及基底准备……………………………………42.2埋设管道…………………………………………4-53挖基…………………………………………………………53.1掘土幅………………………………………………53.2掘土底面