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Taw Qhia Rau Cov Hmoov Txhuam Tshuab Tam Sim No Nws Los Ua kom tiav, txaus nyiam, thiab corrosion, forrosion) forrove ntawm cov khoom hlau, hmoov hmoov ua raws li txoj kev siv tau zoo. Seb koj yog tus tshiab rau kev lag luam lossis xaiv nthuav dav