7 INDUSTRIAL MACHINE PARTS, NAMELY, COUPLINGS OR CLUTCHES IN WHICH THE TORQUE TRANSMISSION OF LIQUID MEDIUM OCCURS, AND PARTS THEREOF, NAMELY CASINGS, DISKS, AND PLATES; INDUSTRIAL MACHINE PARTS, NAMELY, LIMITED-SLIP DIFFERENTIALS, AND LIQUID COUPLINGS, AND PARTS THEREOF, NAMELY, CASINGS, GEARS, BEARINGS, AND MECHANICAL SEALS FOR INDUSTRIAL MACHINES; AND COUPLINGS FOR DRIVES FOR INDUSTRIAL MACHINE ENGINES AND PARTS THEREOF