A computer-implemented data processing system, computer-implemented method and computer program product for processing data. The reinforcements are provided on the sides of the reinforcements which are in contact with a longer side wall surface of a rectangular tank. The sampling assembly allows for repeated retrieval of collected samples and replenishment of empty sample chambers using the retrievable skid. To change first and second rear seats from a current position mode to the reproduction position mode, the reproduction switch is turned on for change into the reproduction position mode. As such, the first and second torque output units can drive the rotating shaft to rotate in two opposite directions.