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- spectra (17)
- organic compounds (8)
- spectrum analysis (8)
- handbooks, manuals, etc (6)
- vibrational spectra (6)
- 图集 (6)
- nuclear magnetic resonance spectroscopy (5)
- atlases (4)
- infrared spectroscopy (4)
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- atomic spectroscopy (3)
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- infrared spectra (3)
- molecular spectroscopy (3)
- polymers (3)
- proton magnetic resonance spectroscopy (3)
- 光谱 (3)
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