bsolute optical frequency measurement 绝对光频测量; 绝对光频测 fw{gx
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absorpting loss in optical thin-film 光学薄膜的吸收损耗 Jo23P.#<
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console optical-display plotter 控制台光显示绘图仪 C8i^P}y
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continuous variable optical attenuator 连续可变光衰减器 %z4Nl$\
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continuous-wave optical ranging system 连续波光学测距系统 yY&I