SYSTEM FOR REDUCING FRICTION RESISTANCE OF SHIP USING PIEZO-THERMAL DEVICE AND METHOD THEREOF
PLUGGING APPARATUS FOR REPAIRING SEAWATER OUTLET-INLET FOR SHIP
APPARATUS OF WAVE GENERATORS AND A MOORING SYSTEM TO GENERATE ELECTRICITY
TENSION-LEG FLOATING PLATFORM THAT IS PARTICULARLY SUITABLE FOR HARNESSING WIND ENERGY
TENSION-LEG FLOATING PLATFORM THAT IS PARTICULARLY SUITABLE FOR HARNESSING WIND ENERGY
DRAIN SYSTEM HAVING POWER-OFF FUNCTION AND DRAIN METHOD USING THE SAME