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Kémcsövek színes anyagokkal. Iskolai laboratórium. Csoport iskolai tanulók tanulmányozza kémiai folyadékok. Lányok és a fiú hallgató magatartás iskolai kísérletet folyadékokkal. Ellenőrizze az eredményt. Iskolai kémia lecke.

Kémcsövek színes anyagokkal. Iskolai laboratórium. Csoport iskolai tanulók tanulmányozza kémiai folyadékok. Lányok és a fiú hallgató magatartás iskolai kísérletet folyadékokkal. Ellenőrizze az eredményt. Iskolai kémia lecke. - Stock fotó és kép

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Kémcsövek színes anyagokkal. Iskolai laboratórium. Csoport iskolai tanulók tanulmányozza kémiai folyadékok. Lányok és a fiú hallgató magatartás iskolai kísérletet folyadékokkal. Ellenőrizze az eredményt. Iskolai kémia lecke. - Stock fotó és kép

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