| 摘要 |
<p>A cutter having a plurality of cutting blades (3) for a suction-dredger which in operation is driven into rotation so that said cutting blades are capable to cut loose the soil which, mixed with water is subsequently sucked up by means of a suction tube, one or more nozzles (6) being provided on each cutting blade, at the back of its cutting edge so that the fluid jet ejected from the nozzles of a cutting blade pretreats the soil portion to be cut loose by the next cutting blade.</p> |
