DENTAL MACHINES; DENTAL DRILLING MACHINES; TOOLS FOR DENTAL MACHINES; DENTAL TREATMENT CHAIRS, STANDS AND LOCKERS; HANDPIECES FOR DENTAL MACHINES; APPARATUS FOR SUPPLYING DENTAL MACHINES WITH FLUSHING OR COOLING MEDIUM; AIR AND WATER HEATERS FOR DENTAL MACHINES; MOTORS FOR DENTAL MACHINES; PRESSURE FLUID DRIVEN COMPRESSED AIR MOTORS FOR DENTAL HANDPIECES; PUMPS, COMPRESSORS, BLOW NOZZLES, SUCTION NOZZLES, PRESSURE VESSELS, VALVES AND PRESSURE FLUID HOSES ASSOCIATED WITH DENTAL MACHINES