Školák provádějící chemický experiment na měření chemických kapalin v základní vědecké třídě. Chytré výsledky analýzy žáků v laboratoři

Školák provádějící chemický experiment na měření chemických kapalin v základní vědecké třídě. Chytré výsledky analýzy žáků v laboratoři - Stock fotografie a obrázky

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