抽沙船中段带有一定容量的泥舱，独立完成挖泥、运泥、倒泥三个过程；耙吸管一般为柔性管，可收放。其作业特点是边航运边挖泥，在航运中通过耙头搅松底泥，然后通过安装在船舱或耙管上的泥泵将搅松的底泥吸入船内泥舱，待泥舱泥满后收起耙吸管，将泥云至抛泥区排放后，回到疏挖区继续挖泥，周而复始。

Pumping sand in the middle with a certain capacity of the hopper, independent of the completion of dredging, mud, to pour mud three processes; the suction pipe is generally flexible pipes, retractable. Its operation is characterized edge edge shipping dredging, in shipping through rake head stirring loose sediment, followed by installed in the cabin or harrow tube mud pump will stir the loose sediment ship mud tank suction, to be mud hopper full pack of the suction pipe, mud cloud to throw mud area emissions to sparse dig section to dredging, go round and round.