This Sub-class includes manufacture, repair and/or maintenance of: •air or vacuum pumps, air or other gas compressors •pumps for liquids whether or not fitted with a measuring device •pumps designed for fitting to internal combustion engines: oil, water and/or fuel pumps for motor vehicles, etc. •hand pumps
•manufacture of inlet and exhaust valves of internal combustion engines, see 2811 •manufacture of air-conditioning systems and copressors (except motor vehicles), see 28191