Material treatment, namely, tempering of metals

'materi':1 'metal':6 'name':3 'temper':4 'treatment':2

Heating furnaces for industrial use; industrial cooking ovens; refrigerating machines for industrial use; air conditioning apparatus and installations for industrial use; and industrial heating and annealing furnaces, cooling vats, cooling jets, and appliances; all for heating, cooling and tempering of metals

'air':14 'anneal':26 'apparatus':16 'applianc':33 'condit':15 'cook':7 'cool':28,30,37 'furnac':2,27 'heat':1,24,36 'industri':4,6,12,20,23 'instal':18 'jet':31 'machin':10 'metal':41 'oven':8 'refriger':9 'temper':39 'use':5,13,21 'vat':29

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