| 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) |
| G05 | Fluid valves & other armatures |
| H08 | Evaporators, condensers and receivers |