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Stockphotos.ro (c) 2026. All stock photos are provided by Dreamstime and are copyrighted by their respective owners.
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| navigate by keyword : 555 adjustable ammeter appliance battery binding blackboard class cupboard desk detail device dial education electric electronic energy equipment experience formula frequency galvanometer industry instrument investigate laboratory measurement mechanism metal metering nobody number object old one physical post precision research scale school science stainless technical test tester tool white wiring yellow |
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| Educational galvanometer with not real number 555 on yellow desk in empty physics school class; formula on blackboard |
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Stockphotos.ro (c) 2026. All stock photos are provided by Dreamstime and are copyrighted by their respective owners. |
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