对称三相电路负载Y连接，已知相电压，则线电压=（   ）V。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69035' and id < 4471194 and id<>'4471194' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69035' and id > 4471194 and id<>'4471194' order by id asc limit 5