ðə vˈeɪpɚz ɑːɹ kˈæɹid baɪ ðə ɹɪˈæktɪv ɡˈæs, wˌɪtʃ ɪz ˈɑːksɪdʒən ɪn kˈeɪs ʌv mˈɛɾəl ˈɑːksaɪdz ɔːɹ ɐsˈɛɾəlˌiːn ɪn kˈeɪs ʌv mˈɛɾəl kˈɑːɹbaɪdz.
The vapors are carried by the reactive gas, which is oxygen in case of metal oxides or acetylene in case of metal carbides.