Dust filters and bags for vacuum cleaners; Electric fan units for vacuum cleaners; Electric vacuum cleaners and their components; Pneumatic air preparation equipment, namely, airline filters, lubricators, and regulators, all being parts of machines; Suction nozzles for vacuum cleaners; Electronically and power-operated tools, namely, pullers and components therefor, nut splitters, extractors, separators, spanners and coil spring compressors; Central vacuum cleaning installations; Vacuum clean...