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Two piece patented wheel and disc system for interchangeability on equipment.
两片专利的车轮和光盘系统，对设备的互换性。
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What are the two most common optical disc formats?
什么是最常见的两种光盘格式?。
youdao
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What are the two most common optical disc formats?
什么是最常见的两种光盘格式?。
youdao