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• Qhov Tab

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  iron powder nrog powder metallurgy

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• Qhov Xyoos

  Tsis Npaj Hmoob Thawj Tshwm Nyob Rau Txwv Tshwm

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• Tus Kev Yog Los

  Magnetite Fe3O4 Tsis Npaj

  Sib Tshuaj Steel