three test tubes with blue and red liquids stand laboratory science |
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| navigate by keyword : test tube laboratory science experiment chemical liquid blue red rack stand glass beaker research education medical health biology chemistry analysis sample solution substance clear transparent clean studio isolated white background equipment tool scientific discovery innovation reaction mixture concentration measurement data observation |
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| Three clear glass test tubes filled with colored liquids, two with blue and one with red, are held upright in a light blue laboratory stand. The liquids are visible in both the upper and lower portions of the tubes, against a neutral background |
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