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steel grating Surface Treatment
1.Hot dipped galvanized :According to GB/T13912-92 standard :the average zinc thickness is more than 610g/m²(flat bar ≥5mm) and 460g/m²(flat bar <5mm)
2.Painting :According to the clients' requirement, choose japanning dipped coating
3.No surface treatment
building materials galvanized steel grating walkway
