Peb lub tuam txhab lub qhov rooj hluav taws muaj qhov sib txawv ntawm lub sijhawm hluav taws kub los xaiv. Hluav taws kub ntsuas steel qhov rooj muaj kev tiv thaiv corrosion heev vim yog siv cov hlau galvanized hauv kev tsim cov nplooj ntawv thiab ncej. tuaj yeem kho raws li koj qhov loj me, txais tos sab laj nrog peb.

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