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单词 light pen
释义
light pen
noun [ C ]
  IT ukus
a pen-shaped object that uses beams of light to read bar codes (= small rectangular patterns of printed lines that store data) or that you use to touch a computer screen in order to choose information:
Outgoing inventory can be quickly checked with light pens connected to each terminal.
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更新时间:2024/11/11 5:57:30