Sandwich Vaj Huam Sib Luag Tsev Kho Mob Ua tiav

Sandwich- vaj huam sib luag-tsev cog khoom- yog- ua tiav los ntawm Jianda Greenhouse, lub tsev cog khoom npog cov khoom no yog cov khoom siv sandwich .

steel ncej kuj yog siv kub dip galvanized raj

covering is sandwich panel anti fire and blackout