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Vector illustration of isolated cylinder batteries in cartoon style.
Close up of a large group of used batteries for recycling process
PH Scale. Level of acid and alkaline balance. Ph analysis or chemical test. Set of Education Posters. Flat Vector illustration.
Healthy dinner or lunch. Woman in t-shirt and jeans standing and holding vegan superbowl or Buddha bowl with hummus, vegetable, salad, beans, couscous and avocado and smoothie in hands, square crop
Ph scale chart indicator diagram value, colorful gradiant strip,alkaline, neutral, acidic solution ,ph icon, for chemistry teachers,chemist,demonstration,informative,educational

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