Pumps as parts of machines, motors and engines; Pumps for machines; Vacuum pumps; Electric pumps; Compressed air pumps; Suction pumps; Compressors for machines; Blowing machines for the compression, exhaustion and transport of gases; Compressed air machines; Air suction machines; Centrifugal blowers; Axial flow blowers; Dust exhausting installations for cleaning purposes; Dust removing installations for cleaning purposes; Vacuum cleaners