Qeto ea theko ea valve ea China le ts'ebetsong
Ka tsoelo-pele e tsoelang pele ea indasteri, li-valve, e le thepa ea ho laola metsi e sebelisoang hangata, e 'nile ea sebelisoa haholo liindastering tse sa tšoaneng. Mererong ea boenjiniere masimong a petroleum, lik'hemik'hale, metallurgy, matla a motlakase, kaho le ...
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