Chemistry lesson. Bearded teacher and schoolgirl in classroom. Chemistry and biology. School chemistry.

Research studies. Science teacher and pupils doing research work. Teacher and primary school children holding test tubes in research laboratory. Experimental research is conducting a laboratory test

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Obrázek Research studies. Science teacher and pupils doing research work. Teacher and primary school children holding test tubes in research laboratory. Experimental research is conducting a laboratory test fotografie, snímků a reklamní fotografie. Image 130300517.

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Research Studies. Science Teacher And Pupils Doing Research Work. Teacher And Primary School Children Holding Test Tubes In Research Laboratory. Experimental Research Is Conducting A Laboratory Test Royalty Free Fotografie A Reklamní Fotografie. Image 130300517.

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Research studies. Science teacher and pupils doing research work. Teacher and primary school children holding test tubes in research laboratory. Experimental research is conducting a laboratory test

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