Laboratory assistant and his pupil looks on the steaming liquid in a flask
Medium shot of blond female chemistry teacher showing steaming and bubbling glass flasks with colorful liquid to schoolchildren in lab coats
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Chemistry beakers, bottles and flasks with colorful liquids in an old pharmacy
Laboratory glassware with chemical liquid. Closeup of lab flask with chemical liquids on table. Measuring cups with chemical reagents. Glass flask with colorful liquids in chemical laboratory
Close-up of colorful flask in which the liquid is mixed by a special device
Close-up of colorful flask in which the liquid is mixed by a special device
Close-up of colorful flask in which the liquid is mixed by a special device
No people focus on chemical laboratory shelf with flasks full of colorful liquids at daytime