Raws li ib qho ntawm feem kev sib tw dai ntawm lub tuam txhab, peb HDG cam khwb cia hlau yeeb nkab lub rooj zaum yog tsim los rau kev txuas cov kav dej uas qhov ntev ua haujlwm thiab txoj kev kho kom haum. Thiab lawv tau txais lub npe nrov nrov thoob ntiaj teb, tshwj xeeb tshaj yog Asmeskas North, South America, Middle East thiab Asia. Kuj, muaj ntau yam kev kho saum npoo rau koj qhov kev xaiv: Zinc-plated, Kub Dipped Galvanized, epoxy thiab Green galvanized tiav, kom tau raws koj qib sib txawv 'anticorrosion xav tau.