Lub hom phiaj ntawm SGS daim ntawv ntsuam xyuas yog muab cov ncauj lus kom ntxaws thiab kev soj ntsuam cov txiaj ntsig ntawm cov khoom tshwj xeeb, cov khoom siv, txheej txheem lossis cov txheej txheem txhawm rau txheeb xyuas seb nws ua tau raws li cov cai, cov qauv, cov lus qhia tshwj xeeb lossis cov neeg siv khoom xav tau. Txhawm rau kom cov neeg siv khoom tuaj yeem yuav thiab siv ...
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