BARGES FOR IMPELLER REPLACEMENT OF THE AERATION TANK AND THE METHOD OF USING IT
DEFEAT RESISTANT BALLAST FILTRATION SYSTEM AND ASSOCIATED METHODS
ALGAE SCUM COLLECTING SYSTEM HAVING A PLURALITY OF FLOATING BODIES
CRAIN AND WATER JET SYSTEM FOR COLLECTING MARINE GARBAGE
Movable shoreside type algae removal spraying device and method
FLOCCULATION AND MAGNETIC SEPARATION DEVICE, SHIP EQUIPPED THEREWITH, AND METHOD OF OPERATING SAME