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.
风力发电的趋势是进步机组的经济性，进步单机的发电容量等级和效率，降低单位造价及发电本钱。
The trend of wind power generation is to improve the economic performance of the unit, to improve the level and efficiency of single generation capacity, reduce unit costs and generating costs.
某一电压等级的输电距离，受输电线路的电压损失及输送容量限制。
The transmission distance at certain voltage level, is restricted by power line's voltage loss and transmission capacity.
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