Li-valve liindastering tse fapaneng ka mefuta e mengata ea ts'ebeliso, haholo ho petroleum, petrochemical, lik'hemik'hale, metallurgy, matla a motlakase, polokelo ea metsi, kaho ea litoropo, mollo, mechini, mashala, lijo le tse ling (tseo, indasteri ea mechini le ea lik'hemik'hale. basebelisi ba 'maraka oa li-valve ke...
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