短語(yǔ)詞組短語(yǔ)drainage e pipe 排水管reversal drainage steel pipe 反向排水鋼管drainage trunk pipe 排水主干管drainage vent pipe 排水通氣管Water Drainage Iron Pipe 鑄鐵排水管Drainage Soft Pipe 排水軟管Xinxing Water Drainage Iron Pipe 新興鑄鐵排水管Reserved drainage pipe interface 保留的排水管道接口;保留引流管接口drainage pipe slope 疏水管道坡度 返回 drainage pipe