23.100.01 |
Fluid power systems in general |
23.100.10 |
Pumps and motors |
23.100.20 |
Cylinders |
23.100.40 |
Piping and couplings |
23.100.50 |
Control components Including valves
|
23.100.60 |
Filters, seals and contamination of fluids Hydraulic fluids, see75.120
|
23.100.99 |
Other fluid power system components |