Excavator Works with Bucket to Clear Mud Sludge and Debris from the Bottom of the Drained River-1

mud dredging dredging drained river cleaning river land reclamation deep mud excavator moves river bottom excavator works river clean river river flow waterways polluted regeneration project mud machine backhoe construction equipment large excavator sludge canal digger excavator bucket reclamation debris rubble water excavator operator ground workmen mechanical digger yellow excavator breaking angle dirty equipment rental sink littery safely improvement banks contract powerful engine iron arm impure grab caterpillar strong arm business