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原材料主要来源:
Nippon Steel Corporation (Japan): Aluminum, Brass, Bronze
NKK Corporation (Japan): Stainless Steel, Electro Galvanized
Brushwellman Ltd. (Japan): Stainless Steel, Bronze
Union Steel Co. Ltd. (Korea): Aluminum, Hot Dipped Galvanized
Zhang Tai Co. Ltd. (Taiwan): HRPO, High Strength Alloy Steel, CRS