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û4-Hȸ ְ, û ̹ ߿ȸ û ִ û , û ϸ 4-H ̳ ˸ ߿伺 ȫϰ õ ڸ.
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翡 泲, ̿ϼ , 泲ǿ, ǿ, ȸǿ, ѱ 4-H߾ӿȸ, û 4-Hȸ, û 4-H ȸ, ù 1õ 翡 ߴ.
̹ 4-H ˸, ùΰ Բϴ 4-H 簡 ǵ پ ÿ ü .
û ʷ ź߸ Ư Ϳ ߸ ߿ܿ ̿ ߴ ߿ȸ ؼ ߱̿(LED) ̿ ս ȭ ƴ.
Ư, û 깰 ǰ ȫ‧ 簡 õ, ‧ ȸ ϰ ü ȭϴ ð .
̿ϼ ۳ ѱ4-H߾Ӿ߿ȸ 꿡 ̾ ̹ û4-H ߿ȸ ϰ ǹ ְ Ѵ١ ûε ϰ, ûε ֵ ϰڴ١ ߴ.
赿 泲4-Hȸ ̹ ߿ȸ ùε鿡 4-H ̳ ˸ ߿伺 4-H û ˸ ּ ߴ١ .
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