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Use a homemade spectrometer to scan different materials, and contribute to an open source database.
| 5 spectra | 0
| 6 spectra | 0
23-09-2017
| 2 spectra | 0
| 9 spectra | 0
duaa_abdo | 1 day ago
moe | 1 day ago
pomah | 1 day ago
