Cov ntsia hlau feem ntau yog tsim rau cov ntoo tawv thiab mos, xyoob daim, lossis yas, phab ntsa foundry, kho rooj tog, ntim thiab lwm yam. Dav siv dav hauv kev tsim kho, kho kom zoo nkauj, thiab kho dua tshiab.Cov ntsia hlau feem ntau yog tsim los ntawm cov hlau tsis tshua muaj Q195, Q215 lossis Q235.Cov ntsia hlau ntau tuaj yeem polished, electro galvanized thiab kub dipped galvanized tiav 3 nto kho.