Raws li ib qho ntawm feem kev sib tw dai ntawm lub tuam txhab, peb HDG cam khwb cia hlau yeeb nkab ib qho kev txhawb nqa cov menyuam yog tsim los rau kev txuas cov yeeb nkab 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. Tsis tas li, muaj ntau cov kev kho saum npoo rau koj cov kev xaiv: Tiaj, Kub Dipped Galvanized, epoxy thiab Green galvanized tiav, kom tau raws koj cov qib sib txawv ntawm cov kev xav ua tsis tau.