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Digging and dredging grabs are heavy-duty mechanical equipment used to excavate and remove silt, sand, gravel and other materials. They are usually used in ports, waterways, rivers, lakes and ocean engineering to maintain and improve the navigation conditions of the waters.
link:https://www.kinocranes.sg/grab-bucket/grab-for-digging-and-dredging.html
Grab For Digging And Dredging | Kenancranes