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CHIA SẺ KIẾN THỨC KỸ THUẬT

Jun 5, 2017

EBOOK - Electricity Experiments for Children (Gabriel Reuben)


Fifty-five projects in electricity, magnetism, electronics; making a compass, wiring a simple electromagnet, obtaining electricity from a lemon, reactivating a dry cell, making a flashlight, constructing a Geiger counter. All safe.

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