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關注：1
2013-05-23 12:21
求翻譯：Typical applications are pump and fan drives and low-cost drives. The main idea of this method is vari-ation of the supply voltage frequency abstractedly from是什么意思？ 待解決
 懸賞分：1
- 離問題結束還有
Typical applications are pump and fan drives and low-cost drives. The main idea of this method is vari-ation of the supply voltage frequency abstractedly from
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