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  1. Ferrous and Non-Ferrous Metals | Examples & Lists of Metals - Fractory

  2. 为什么将金属分为有色金属和黑色金属? - 知乎

  3. Ferrous - Wikipedia

  4. What Metals are Ferrous? (A Complete Guide) - TWI

  5. What are Ferrous Metals? Definition & Examples - Service Steel …

  6. Ferrous Metals | History, Types, Properties, & Uses

  7. Iron - Wikipedia

  8. Ferrous and non-ferrous metals - Material categories and …

  9. Ferrous Metals – EngineeringTechnology.org

  10. Ferrous Metals and Their Alloys - SpringerLink