26 TESTING AND MEASURING EQUIPMENT AND MACHINERY-NAMELY, BEARING TESTING MACHINES, LUBRICATION TESTING MACHINES INCLUDING 5-BALL RIGS, GREASE TEST SPINDLES, FRETTING CORROSION RIGS, AIR FRAME BEARING TEST RIGS, ROTATIONG BALL FRICTION AND WEAR TEST RIGS, MONITORING UNITS FOR BEARING TESTING EQUIPMENT AND MONITORING UNITS FOR LUBRICATION TESTING EQUIPMENT