Catalytic converters; heat exchangers being parts of machines; boiler tubes as parts of machines; machines for the petroleum refining industry for use in refining petroleum.

'boiler':9 'catalyt':1 'convert':2 'exchang':4 'heat':3 'industri':20 'machin':8,14,15 'part':6,12 'petroleum':18,25 'refin':19,24 'tube':10 'use':22

Cast steel; steel alloys; ingots of common metal; metals in foil form for 3d printers; common metals in powder form; steel pipes; metal pipes and fittings therefor; rods of metal for brazing and welding; rods of metal for welding; metal beams; common metal powders used in manufacturing.

'3d':14 'alloy':4 'beam':41 'braze':32 'cast':1 'common':7,16,42 'fit':26 'foil':11 'form':12,20 'ingot':5 'manufactur':47 'metal':8,9,17,23,30,37,40,43 'pipe':22,24 'powder':19,44 'printer':15 'rod':28,35 'steel':2,3,21 'therefor':27 'use':45 'weld':34,39

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