DW-50-20-F-D-300 DW-50-20-F-D-400 DW-50-20-F-D-450 DW-50-20-F-D-693 DW-50-20-F-D-760 DW-50-20-F-D-780 DW-50-20-F-D-785 DW-50-20-F-D-790 DW-50-20-F-D-795 DW-50-20-F-D-800