Introduction to sand blowing: The large dredgers that can be seen in the sea outside the reclamation site are connected to the long sand blowing pipeline. They are spraying sand. The scene is extremely magnificent and representative. Construction screen. They are witnesses of builders transforming nature and challenging it. In the Nanhuizui reclamation project, a total of 14 large cutter suction dredgers were used to connect more than 80 kilometers of sand blowing pipelines.