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  1. Oxford Dictionary

    tympan

    • IPA[ˈtɪmpən]

    英式

    • n.
      (in letterpress printing) a layer of packing, typically of paper, placed between the platen and the paper to be printed to equalize the pressure over the whole forme.；another term for tympanum

    • noun: tympan, plural noun: tympans

    • 更多解釋

    tympan

    • IPA[ˈtimpən]

    美式

    • n.
      (in letterpress printing) a layer of packing, typically of paper, placed between the platen and ...

    Oxford American Dictionary