832-394385 - Laboratory examination with laboratory apparatus and monitor, evaluation of a laboratory examination with chemist in the laboratory, Freiburg, Baden-Wuerttemberg, Germany, Europe
832-394397 - Young chemist with sample and laboratory glasses working in a laboratory with laboratory equipment and monitor, Freiburg, Baden-Wuerttemberg, Germany, Europe
832-394395 - Result of a laboratory examination, chromatography in the hand of a chemist in the laboratory, food control examination, Freiburg, Baden-Wuerttemberg, Germany, Europe