value scale chart for acid alkaline solution test meter with round rainbow indicator |
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| navigate by keyword : scale paper value acid alkaline chart test litmus balance water meter base chemical chemistry experiment food measure indicator vector soil analysis acidity science spectrum level ammonia illustration urine infographic lab number rainbow isolated icon color ph5 hydrogen concentration background detergent reagent universal medicine control rain soap health solution round |
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| Ph value scale chart for acid, alkaline solution vector illustration. Test meter with round rainbow indicators for lab measure of acidity level in chemical analysis, medicine, infographic background |
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