sea going hopper suction dredger

... 自航耙吸式挖泥船 sea going hopper suction dredger 边抛耙吸式挖泥船 trailing suction side caster dredger 耙吸式挖泥船的耙头 draghead ...

 trailer suction dredger

... trailer coupling拖车联结器 trailer suction dredger自航耙吸式挖泥船 trailer towing拖车控制 ...