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O le kesi fa'apitoa o se kesi e fetaui ma fa'amoemoega fa'apitoa, e aofia ai kesi tasi po'o kesi fefiloi. E masani ona vaevaeina i le kasa faaeletonika, kasa masani, kasa puipuiga o le siosiomaga, kasa faafomai, kesi uʻamea, sterilization gas, ma isi, lea e masani ona faʻaaogaina i mea tau eletise, eletise, petrochemical, mining, uamea, faʻafefeteina uʻamea, vevela. inisinia, biochemistry, mataʻituina o le siosiomaga, suʻesuʻega faafomaʻi ma suʻesuʻega, faʻasaoina o meaʻai ma isi matāʻupu.