7 compressed air engines, pneumatic valves, hydraulic valves, pneumatic cylinders, hydraulic cylinders, filtering machines, vacuum pumps, compressed air pumps, compressors; mechanical and electro-mechanical controllers, mechanical and electro-mechanical speed controllers and mechanical and electro-mechanical regulators for machines and engines (other than land vehicle engines); filters, lubricators, mufflers and silencers for machines and engines (other than land vehicle engines); hydraulic, pneumatic and clean air systems comprising the above components