expand the pipe network的意思|示意

扩建管道网络 扩建管道网络expand the pipe network 淘汰或改造燃煤锅炉eliminate or convertcoal-burningboilers ..

扩建管道 符合举办奥运会的要求 meet the requirements of hosting the Olympic Games 扩建管道 expand the pipe network 淘汰或改造燃煤锅炉 eliminate or convert coalburning boilers ..

扩建管道收集 ... 开展绿色勾当 advocate green activities 扩建管道收集 expand the pipe network 普及环保常识 popularize environmental protection knowledge ...