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Blood sugar monitor and test kit on blue backgroundDas Bild Blood sugar monitor and test kit on blue background von…

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Set of chemical tests for water with reagentsDas Bild Set of chemical tests for water with reagents von Marco Verch…

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Analysis of the composition of the water, determination of the amount of ferrum or iron in waterDas Bild Analysis of…

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Test tubes in laboratory with colorful liquids and balls on whiteDas Bild Test tubes in laboratory with colorful liquids and…

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Hand with a pipette drips the solution into a plastic flaskDas Bild Hand with a pipette drips the solution into…

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