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    X-ray thickness gauge X射線厚度計 A device comprising an X-ray source and a detector used to determine the thickness of material in sheet or plate form, including metals, paper, plastics, rubber, and ceramics.
    一種由X射線源和探測器組成的裝置,用于測定片狀或平板狀材料的厚度,包括金屬、紙張、塑料、橡膠和陶瓷。
    X–Y recorder X-Y記錄儀 A device that plots a graph of a variable y against a variable x, both in the form of voltages.
    一種繪制變量y和變量x的圖形的設備,兩者都以伏特數的形式。