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1·The equipment, method and advantages of rigid bed-sweeping by grab dredger are presented combining an engineering case.

结合实例阐述了利用抓斗船进行硬式扫床的设备结构，扫床方法及其优点。

2·Industrial test carried out with a grab dredger shows that the performance of the converter meets the demand of the dredger.

通过挖泥船工业性试验表明，该变矩器性能满足了大型抓斗挖泥机的作业要求。