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Materials: Steel Q235, 35#, 45#; Alloy Steel 40Cr, 42CrMo, 35CrMo Grade: 4.6/4.8/5.6/5.8/8.8/10.9/12.9 Surface: Plain Oiled, Oxygen Black, Zinc Plated, Hot Dip Galvanized, Dacro coating Sample: Free ...