APPARATUS FOR TREATING BALLAST WATER WITH ULTRAVIOLET RAYS, HAVING DOUBLE WIPER STRUCTURE
MULTICAGE-TYPE DEVICE FOR FILTERING BALLAST WATER FOR PREVENTING BACK PRESSURE
COMPACT AND OPERABILITY-ENHANCING MULTICAGE-TYPE DEVICE FOR FILTERING BALLAST WATER
Compact and operability-enhancing multicage-type device for filtering ballast water
Apparatus for treating ballast water with ultraviolet rays, having square cross-section
CANDLE-TYPE FILTERING DEVICE FOR PREVENTING BACK PRESSURE