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每经AI快讯，10月21日，美股光通信股盘前普涨，Lumentum涨4.10%，康宁涨3.31%，Coherent涨4.18%，应用光电涨4.77%，Ciena涨1.67%，博通涨1.44%，迈威尔科技涨2.80%。
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