以下四组220V单相供电系统电压偏差值( )在允许偏差范围内.
2023-05-14
A. +5%, -8% C.-10%, -7%;
B.+8%, -5%; D. +10%,-6%.
参考答案:AC
B.+8%, -5%; D. +10%,-6%.
参考答案:AC
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2023-05-14
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