scientist taking sample water with pipette and test tube for analysis |
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| navigate by keyword : water sample analysis pipette test tube scientist science research laboratory experiment liquid environment environmental protection safety ocean lake river clear transparent rack holding hand dropper fluid pink outdoor sunny day pollution testing quality healthcare medical chemical chemistry biology |
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| Close up shot of a scientist holding a transparent test tube rack with liquid inside and using a pipette to take a sample of the water for analysis on a sunny day outside concept of water safety and environmental protection |
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