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。
Industrial test carried out with a grab dredger shows that the performance of the converter meets the demand of the dredger.
进行挖泥工程时，只可使用密封抓斗式的机械挖泥机，以挖掘河床或塘底的淤泥。
For dredging works, only mechanical dredgers with bucket-type closed-grabs shall be used for the dredging of river bed or ponds.
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