Resistance chaw vuam tshuab, feem ntau hu ua qhov chaw vuam, yog cov cuab yeej tseem ceeb hauv ntau yam lag luam, suav nrog tsheb, aerospace, thiab kev tsim khoom. Cov tshuab no ua lub luag haujlwm tseem ceeb hauv kev koom nrog cov khoom siv hlau ua ke nrog qhov tseeb thiab kev ntseeg tau. Hauv tsab xov xwm no, peb yuav tshawb nrhiav ...
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