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Health, 18.10.2021 07:30 mathiscool7

có một ngôi nhà mái dốc nhà cao12m mái cao1,5m người ta bố trí 2 kim thu sét dài bằng nhau tại hai đầu hồi khoảng cách ha thu sét là 22m hãy tính chiều cao cảu hai cột thu sét để bảo vệ an toàn cho ngôi nhà

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có một ngôi nhà mái dốc nhà cao12m mái cao1,5m người ta bố trí 2 kim thu sét dài bằng nhau tại hai đ...
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