Hexagonal guardrail customized corrosion poob qhov qub cov yam ntxwv, nyob rau hauv cov nqe lus ntawm cov duab, xim thiab txhua yam khoom yuav hloov, ua rau cov khoom puas, pipeline to, tshwj xeeb tshaj yog, yog ib qho yooj yim rau tawg, poob qhov qub kev tiv thaiv muaj nuj nqi.Corrosion feem ntau yog hlau corrosio...
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