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.
平台分色机原稿放置于平台上而分色的扫描机，它和影印机相似；和那些需用扫描圆筒者有别。
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The drum scanner gets its name from the clear acrylic cylinder, the drum, on which the original artwork is mounted for scanning.