Cov ncej hlauyog cov txha nraub qaum ntawm cov txheej txheem steel framing hauv cov qauv hlau suav nrog cov tsev hlau, cov tsev rau khoom, cov nroj tsuag kev lag luam, cov ntawv thov lag luam, thiab lwm yam. Kev xaiv suav nrogCov ncej hlau W-puab, cov kem hlau uas tau tsim tsa,thiabHSS cov kabuas yog cov kev daws teeb meem feem ntau siv raws li qhov xav tau ntawm kev thauj khoom, kev tsim qauv vaj tsev, thiab kev txiav txim siab txog kev tsim khoom.
Lub sijhawm tshaj tawm: Lub Yim Hli-11-2026