Thermal treatment of metal, namely, tempering hardening, and surface treatments

'harden':7 'metal':4 'name':5 'surfac':9 'temper':6 'thermal':1 'treatment':2,10

Industrial machines for tempering, hardening and surface-treating metal, namely, machines for metal hardening by means of plasma nitriding

'harden':5,15 'industri':1 'machin':2,12 'mean':17 'metal':10,14 'name':11 'nitrid':20 'plasma':19 'surfac':8 'surface-tr':7 'temper':4 'treat':9

Chemicals for hardening, tempering, and surface-treating metals

'chemic':1 'harden':3 'metal':9 'surfac':7 'surface-tr':6 'temper':4 'treat':8

NITRION

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