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  1. shadow mask

    • IPA[ˈSHadō mask]
    • n.
      a perforated metal screen situated directly behind the phosphor screen in certain types of color television tubes, having a pattern of precisely located holes through which the electron beams pass so as to strike the correct dots on the phosphor screen.
    • noun: shadow mask, plural noun: shadow masks

    • 更多解釋
    • n.
      a perforated metal screen situated directly behind the phosphor screen in certain types of ...

    Oxford Dictionary