23 FLUID SYSTEMS AND COMPONENTS FOR GENERAL USE

#	Name
23.020	Fluid storage devices
23.040	Pipeline components and pipelines
23.060	Valves
23.080	Pumps
23.100	Fluid power systems
23.120	Ventilators. Fans. Air-conditioners
23.140	Compressors and pneumatic machines
23.160	Vacuum technology