Cov hlau grate feem ntau yog ua los ntawm carbon steel, thiab saum npoo yog kub-dip galvanized, uas tuaj yeem tiv thaiv oxidation.Nws tseem tuaj yeem ua los ntawm stainless hlau.Cov hlau grating muaj qhov cua, teeb pom kev zoo, cua sov dissipation, tiv thaiv kev nplua, tawg-pov thawj thiab lwm yam khoom.