![Scientist-drop-liquid-in-a-test-tube-and-shaking-in-laboratory.-Pipette-Dripping-a-Colored-Chemical-Substance-in-a-Test-Tubes.-Close-up-of-Science-Man-Working.-High-quality-4k-footage](https://v6.cdnpk.net/videvo_files/video/partners1644/thumbnails/hb3d29168_0193cm_small.jpg)
Scientist drop liquid in a test tube and shaking in laboratory. Pipette Dripping a Colored Chemical Substance in a Test Tubes. Close up of Science Man Working. High quality 4k footage
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