变压器空载实验可测取T型变压器等效电路的（    ）参数。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68479' and id < 4421684 and id<>'4421684' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68479' and id > 4421684 and id<>'4421684' order by id asc limit 5