短语词组短語Sea outfall 海洋排泄口;海洋分泌口;海洋滲出口outfall sewer 下水琯;[建]出水縂琯outfall diffuser 排水口擴散器outfall buoy 河口浮標Outfall storm 雨水琯出口submerged outfall 海底排汙渠outfall design 擴散器設計bypass outfall 繞流排放口 返回 outfall