Cutter Suction Dredger 450 "Fen He" In August 2012 a standard CSD450 was delivered from stock within just three weeks. The stationary dredger was despatched to Taiyuan, northern China, where it performs maintenance dredging work on the river Fen. Its main functions are cleaning the polluted river bed, keeping the river navigable and preventing flooding. View the CSD 450 Virtual Tour Download Product SheetSee all deliveries