| 355 | Loading/discharging systems for lpg/lng in gaseous phase |
| 37 | Gas/ventilation systems for cargo holds/tanks |
| 58 | Sanitary syst. w/discharges, accommodation drain systems |
| 611 | Steam turbines w/condensers |
| 64 | Boilers, steam, gas generators |
| 761 | Distilled and make-up water systems |
| 794 | Automation equipment for boilers |