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roentgen rays
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roentgen rays
X射线,伦琴射线
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optical-electronic scanner
optical element
optical element
optical emission spectrograph
optical emission spectroscopy
optical emissivity
optical encoder
optical encoder
optical encoder
optical encoding system
optical engineering
optical error
optical excitation
optical fabrication
optical Faraday rotation isolator
optical feedback
optical fiber
optical fiber
optical fiber
optical fiber cable
optical fibre
optical fibre
optical fibre
optical fibre
optical fibre
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