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。