... with design dust bag, keep filter from dust,keep superior suction performance;2.Design of Safety Valve , Water-proof capability ... Vacuum Cleaner’s motor , water absorption , oil-Absorbing ,acid suction, Dust absorption ;5.Double-pass cooling system to allow the machine ... future with its excellent quality and service. Standard Accessories: wet and dry vacuum cleaner/20L/25L/30L Capacity/4M cord/CE/GS/ ...