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Comments (3)

  1. Aditya Kumar
    Aditya Kumar:
    1 month ago

    Annealing is not case hardening while other all are case hardening including flame hardening

  2. Ramsagar Vishwakarma
    Ramsagar Vishwakarma:
    5 years ago

    Anneling

  3. Priya Chettiar
    Priya Chettiar:
    5 years ago

    Answer should be Annealing

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