converter technology & electric traction
converter technology & electric traction
变流器技术&电力牵引
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The world rail electric traction converter technology equipments ha ve taken new headway in advancing efficiency and reducing wasting and pollution in the21st century.
进入21世纪，世界轨道电力牵引变流技术装备在降耗提效、减少污染方面取得了新的进展。
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