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Định luật Kirchhoff 1 2
Định luật Kirchhoff 1 2
https://imgs.plurk.com/QzM/v3X/n5TsaOejU5fVyEaoNLJZbEaSPzZ_lg.jpg
https://imgs.plurk.com/QzM/Kcy/rkvUj5mvnMScMVTrW512EJWIdtx_lg.png
https://imgs.plurk.com/QzM/BOe/pF1lr7MAmjk0A7nDrkraQ28MfBa_lg.png
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