A Diffraction Grating Spectroscope - 搜索图片

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Gem-A Diffraction Grating Spectroscope - Gem-A Instruments | Official online …
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Diffraction Grating Spectroscope Size: 25 dia. x 110mm L:Education Supplies…
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3B Scientific U19500 Diffraction Grating Spec…
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Spectroscope - The Gemology Project

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Diffraction Grating Pattern

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