Mabvisirwo etsvina yechubhu inotsemuka tevera matanho ari pasi apa: Danho rekutanga kuchenesa, tinofanira kutanga petroleum cracking chubhu pamusoro pemafuta, tsvina, girizi, uye zvimwe zvinhu zvabviswa. Danho rechipiri nderomuzvarirwo asidhi, kazhinji kutaura, kune maviri ekunhonga kurapwa, chemu ...
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