self-propelled dredger 自航挖泥船

non-propelled dredger [船] 非自航挖泥船

self-propelled grab dredger 自动推进式抓斗挖泥船

self-propelled bucker dredger 自航链斗挖泥船

self-propelled grab hopper dredger 自航抓斗挖泥船

self-propelled sand dredger 自航挖泥船

self-propelled bucket dredger 自航链斗挖泥船

propelled grab hopper dredger 自航抓斗挖泥船