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Diligent classmates adding chemicals to sample tubes

Chemistry lovers. Two pleasant classmates using pipettes and adding some chemicals to the test tubes while conducting an experiment during chemistry class


Size Width Height Mp
Small 333 px 500 px 0.5
Medium 667 px 1000 px 2
Large 1333 px 2000 px 8
Extra-Large 3840 px 5760 px 15

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