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uyenbap0123
2 năm trước
Điện năng ở một trạm phát điện có công suất truyền đi 400kW được truyền đi đến khu dân cư. Hiệu số chỉ của các công tơ điện ở trạm phát và nơi tiêu thụ sau mỗi ngày đêm lệch nhau 360kWh. Hiệ suất của quá trình truyền tải điện năng là:
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