Air condensers; Air suction machines; Blowing machines for the compression, exhaustion and transport of gases; Blowing machines for the compression, sucking and carrying of grain; Centrifugal blowers; Centrifugal fan condensers; Compressed air machines; Compressors for machines; Conveying system equipment, namely, blowers; Electric fans, ventilators and blowers for motors and engines; Pneumatic tube conveyors; Pressure regulators being parts of machines