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틀린 말은 아니다. 100W 백열전구를 27W짜리 LED가 대체하고, 그 수명에서도...star.ohmynews.com 2024-07-10
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안녕하세요, 반갑습니다. 여러분의 전기기술교육의 동반자 다산에듀 대표 전병칠입니다. 여러 조명기구 중 가정에서 소켓형으로 많이 ...youtube 2023-08-16
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