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The principle of the optical scanning holography is introduced.
介绍了光学扫描全息术原理。
But one technology works notably well, Smith said: optical scanning of paper ballots.
史密斯还说:“但是有一种技术运作非常好,那就是对投票纸进行激光扫描。”
Which one of the following characteristics best describes optical scanning devices?
其中之一,有以下特点最能描述光学扫描装置?
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