FOEN 2020 aluminium extrusion tslots tuaj yeem ua los ntawm cov neeg siv khoom xav tau.Cov duab sib txawv ntawm cov txhuas tslots tuaj yeem tsim los ntawm peb pawg kws tshaj lij thiab cov chaw haujlwm nrog cov khoom siv aluminium sib txawv, tshuab thiab chaw.