gloved hand holds empty test tube isolated photo white background |
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| navigate by keyword : analysis analyze chemical chemistry container empty experimental expertise glass gloved hand isolated lab labolatory laboratory measure palm photo research researcher science scientific test testtube tube white |
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| Gloved hand holds empty test-tube. Hand and test tube are isolated on a white background. Nothing is inside chemical glassware. Clean testtube for science experiment. Nothing for chemical test. |
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