... factory Material: Mild (low carbon) steel or stainless steel Style:plain,serrated,I-shape,serrated-I shapeProcess: Steel grating ... , construction, papermaking, medicine, textile, well cover, suspended ceiling, ventilation and penetration of light, etc High ... China steel standard production standards YB-T4001-1998 Steel Grating Standardizations: CountriesNational Standards for GratingMaterialsGalvanizing ...