短语词组短语down take pipe 溢流管breaking down the pipe 将立柱卸成单根common down feed pipe 公共下给管down -pipe 下流管;翻译storm down -pipe 雨水管down convection pipe still 烟气向下流动的管式炉rain down -pipe 水落管down drying pipe 下降干燥管 返回 down pipe