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. 2020 Apr 12;20(8):2183. doi: 10.3390/s20082183

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Test flow of the spectral measurement system: (a) The process of moving to the observation point, (b) emission spectrum measurement system, (c) Arrive at the observation station, and (d) spectral system starts static observation.