quanvjd quanvjd

18-10-2021
Health

contestada

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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abramianmineh abramianmineh

18-10-2021

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im sorry what language is this?

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