Heat exchangers, other than parts of machines

Cleaning systems comprised of machines for cleaning and for automatically cleaning apparatus in the nature of oil and gas industrial machines for refining petrol, hydrocarbons, atmospheric residues; devices, namely, heat exchanger cleaning machine parts in the nature of metal tube inserts for cleaning heat exchangers

'apparatus':12 'atmospher':26 'automat':10 'clean':1,7,11,32,43 'compris':3 'devic':28 'exchang':31,45 'gas':19 'heat':30,44 'hydrocarbon':25 'industri':20 'insert':41 'machin':5,21,33 'metal':39 'name':29 'natur':15,37 'oil':17 'part':34 'petrol':24 'refin':23 'residu':27 'system':2 'tube':40

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