| B04 | Accommodation work (including carpentry, HVAC) |
| E09 | Watertight/weathertight doors & windows |
| F02 | Air filters & spark arresters |
| F03 | Air & gas valves |
| F05 | Fans |
| F06 | AC units, air dryers, air cooling and heating components |
| F07 | Air and gas treatment (dehydrators, air separators) |
| F10 | Other air/gas/pneumatic equipment |
| G02 | Pumps & pump units |
| G04 | Fluid filters |
| G05 | Fluid valves & other armatures |
| G06 | Purification plants & fluid treatment |
| K06 | Electrical heating |
| O04 | Firefighting equipment |
| O06 | Fire protection & detection equipment |