scientist gray protective suit helmet and mask pond pours green liquid from test tube into flask for

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A scientist in a gray protective suit, helmet and mask, on a pond, pours a green liquid from a flask into a test tube, for Royalty Free Stock Photo
A scientist in a gray protective suit, helmet and mask, on a pond, pours a green liquid from a test tube into a flask, for Royalty Free Stock Photo
   
   
   
   
   
A scientist in a gray protective suit, helmet and mask, on a pond, pours a green liquid from a test tube into a flask, for
   
   
   
   
   
   
   
A scientist in a gray protective suit, helmet and mask, on a pond, pours a green liquid from a test tube into a flask, for research, against the background of a concrete pipe, there is a place for the inscription

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