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Standard Specification Material
USS/SAE(B18.22.1 TYPE A) 6#-4" carbon steel and stainless steel
DIN125/DIN126 M3-M100
DIN440
DIN6916/DIN7989
DIN9021
BS4320/AS1252
NFE25513/25514

surfaceplainblackzpyzpHDG,chromemechanical  galvanizing

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