Photo shows an operator remotely controlling the river desilting robot to enter a river. The silt is located by the closed-circuit television and sonar device installed on the robot and collected by suction.

Photo shows an operator remotely controlling the river desilting robot to enter a river. The silt is located by the closed-circuit television and sonar device installed on the robot and collected by suction.

Photo shows an operator remotely controlling the river desilting robot to enter a river. The silt is located by the closed-circuit television and sonar device installed on the robot and collected by suction.