短語詞組短語Drainage open ditch 明渠排水Drainage e Ditch 排水溝drainage blind ditch 排水盲溝design of drainage ditch 排水溝設(shè)計depth of drainage ditch 排水溝深度drainage ditch on raisedridge 畦埂渠溝farm drainage ditch 排水毛溝certified drainage ditch 郃格排水溝surface drainage ditch 地表排水溝 返回 drainage ditch