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Stainless Steel Screw CNC Fastener Use Machine From QBH Materials and Chemical compstition 化学成分CHEMICAL COMPOSI(% ) Type C碳 Si硅 Mn锰 P磷 S硫 Ni镍 Cr铬 Mo钼 Cu铜 Others ≤ ≤ ≤ ≤ ≤ ≥ ≥ ≥ ≈ 201Cu 0.08 1.00 7...