Tanks, of metal; reaction vessels being tanks of metal; tubes of metal, pipes (metal), valves of metal, spargers of metal, poles and posts of metal, screw rings, manifolds for pipes and pipelines, plugs of metal, jets of metal, linkages of metal, grilles, screens, flanges (metal), flashing (metal), containers of metal

Condensers, agitators, aerators, blowing machines, conveyors (machines), compressors, centrifuges (machines), drying machines, pumps, boiler tubes, sieves (machines or parts of machines), sifting machines, steam traps, separators, shaft couplings, pneumatic transporters, pneumatic tube conveyors, pressure regulators (parts of machines), mills (machines), mixers (machines), lifting apparatus, lubricating pumps, grinding machines, hammer mills (machines), crushing machines, disintegrators