Black tšepe terata kopo ka tshebetso, ka sehloohong ke ka ho chesa tšepe billet rolling ka tse tšeletseng ntlha tse hlano limilimithara terata molamu, 'me joale e beha ka ho taka ka mola oa bophara fapaneng, semela ebe butle-butle moqotetsane ho penta poleiti aperture, tsidifatso. le annealing, plating process, joalo...
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