härdning angolul

annealing▼(act of heating solid metal or glass)
noun
[UK: ə.ˈniːl.ɪŋ] [US: ə.ˈniːl.ɪŋ]

hardening▼(process)
noun
[UK: ˈhɑːd.n̩.ɪŋ] [US: ˈhɑːr.dn̩.ɪŋ]