[ Machine tools and mechanical apparatus for the generation of compressed air, vacuum, pressure and air flow, namely, compressed air pumps, vacuum pumps, coupling valves, hoses and filters; ] [ * Air * compressors for machines, namely, reciprocating compressors and screw compressors * except those for air separation, generation, treatment and liquefaction of gases, carbon dioxide recovery or for debulking and liquefaction of natural gas * ; ] [ power-operated blowers for the compression, exha...