| ultraviolet ray o. |
actinic conjunctivitis.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| ultraviolet ray |
An invisible ray of the spectrum beyond the violet rays. The wavelengths of ultraviolet rays vary. They may be refracted, reflected, and polarized, but will not traverse many substances impervious to the rays of the visible spect
출처:
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