A hand in a glove collects a water sample in a test tube, representing the concept of water purity analysis
Schlüsselwörter
laboratory,
laboratory,
scientist,
research,
chemistry,
chemical,
science,
test,
medicine,
experiment,
chemist,
tube,
scientific,
liquid,
analysis,
doctor,
biotechnology,
medicals,
glasses,
pipette,
biology,
woman,
people,
working,
test tube
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