| F01 | Compressors |
| F02 | Air filters & spark arresters |
| F03 | Air & gas valves |
| F06 | AC units, air dryers, air cooling and heating components |
| F10 | Other air/gas/pneumatic equipment |
| G04 | Fluid filters |
| G05 | Fluid valves & other armatures |
| G08 | Separators & traps |
| H01 | Tanks |