The drum scanner gets its name from the clear acrylic cylinder, the drum, on which the original artwork is mounted for scanning.
滚筒扫描仪的名字从明确压克力缸，鼓，而原来的艺术品安装进行扫描。
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Flat-bed scanner a scanner with a flat platen, where the original can be placed flat, rather like a photocopier, as opposed to one with a scanningdrum.