355 | Loading/discharging systems for lpg/lng in gaseous phase |
362 | Freezing and refrigerating systems for dry cargo |
554 | Freezing/refrigerating systems for provisions |
584 | Drinking water systems and coolers |
7 | Systems for machinery main components |
70 | Fuel systems |
71 | Lube oil systems |
722 | Fresh water and other cooling systems |