也就是说，在阻抗匹配平衡牵引变压器SF 2 - QY的基础上再提高一个容量等级。
That is, one more capacity grade can be increased on the base of impedance-matched balance traction transformer SF2-QY.
也就是说，在阻抗匹配平衡牵引变压器SF 2 - QY的基础上再提高一个容量等级。
That is, one more capacity grade can be increased on the base of impedance-matched balance traction transformer SF2-QY.
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