semiconductor self-commutated convertors
...convertors半导体直接直流变流器 Semiconductor self-commutated convertors半导体自换相变流器 Test method for electric strength of insulating adhesive tape at power frequency绝缘胶粘带工频击穿强度试验方法 ..
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semiconductor self-commutated convertors
半导体自整流变换器
以上为机器翻译结果，长、整句建议使用 人工翻译 。