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• ▶ Electricity Basics Ep.45 – Overload protection and leakage circuit breaker｜Audio Book 전병칠 · 2025.09.18
• ▶ Electricity Basics Ep.43 – What is a short circuit?｜Audio Book ｜ Easy to listen to! 전병칠 · 2025.09.18
• ▶ Electricity Basics Ep.38 – What is an electrical circuit?｜Audio Book ｜ Easy to listen to! 전병칠 · 2025.09.18