• 2022-05-27
    What is the meaning of [img=36x37]1803a2fa28d2e21.jpg[/img]?[img=438x327]1803a2fa36fd650.jpg[/img]
    A: Coercive force
    B: Permeability
    C: Main flux
    D: Remanence
  • 举一反三