12 POWER TRANSMISSIONS FOR LAND VEHICLES AND PARTS THEREOF, NAMELY, SHAFTING, BEARINGS, BEARING BLOCKS, LOCKNUTS, RACES, ROLLERS, RETAINERS; SPROCKETS, METAL BELTS, SHEAVES, PULLEYS, GEARS, GEAR DRIVES, SPEED REDUCERS, VARIABLE SPEED DRIVES; AUTOMOTIVE TIMING AND POWER TRANSFER CHAINS; FLUID DRIVES, ECCENTRIC DRIVES, SHAFT COUPLINGS