Automatic swimming pool cleaners and parts therefor; Belt pulleys being parts of machines; Belts for conveyors; Direct current motors; Door closers, electric; Electric door openers and closers; Electric vacuum cleaners and their components; Electricity generators; Fluid power component kit for machine control comprising pumps and valves; Motors and pumps for refrigerators and freezers; Pump control valves; Springs being parts of machines; Transmissions for machines; Vacuum pumps