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PH and chlorine analysis kit for swimming pools. Liquid chlorine and PH meter for swimming pools.
Animation of battery charging. 4k video.
Close-up 4K video of woman eating raw green wrap with leaves of kale shows healthy vegan meal for lunch table. "Food is medicine" concept.
Adding silver batteries AA and AAA in remote controller TV close-up. Batteries are common in portable electronic devices. An AA battery is composed of a single electrochemical cell that may be either

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