| 355 | Loading/discharging systems for lpg/lng in gaseous phase |
| 37 | Gas/ventilation systems for cargo holds/tanks |
| 445 | Garbage disposal plants, incinerators |
| 558 | Laundry, ironing and drying equipment |
| 57 | Ventilation, air-conditioning, heating systems |
| 734 | Instrument air supply systems |
| 75 | Steam, condensate, feed water systems |