SALI cov tsev khaws khoom tshiab, loj dua thiab huv rau kev ua lag luam ntau dua, cov khoom siv raw li tooj liab thiab aluminium ntsej muag vwm tsiv, nrawm rau cov nqi qub.Qhov khoom muaj peev xwm tau nce mus txog 50,000 daim, txhua tus neeg tos txais tuaj thiab txiav txim, tam sim no cov khoom lag luam puv lawm.
