Aerators; Filters and purifiers for machines, namely, filters and purifiers for removing contaminants from gases used in the semiconductor industry; Machine for repair, polishing, buffing and scratch removal on optical discs, CDs, DVDs; Machine tools, namely, clamps for use in the precision clamping of work pieces; Machines for manufacturing semiconductors; Polishing machines for use in grinding and polishing metal, wood, ceramics and plastics; Robotic arms for industrial purposes; Semiconductor manufacturing machines; Semiconductor substrates manufacturing machines; Semiconductor wafer processing equipment; Semiconductor wafer processing machines; Vacuum cleaners