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關注：1
2013-05-23 12:21
求翻譯：大功率雙機拖動型礦井提升機變頻調速技術研究是什么意思？ 待解決
 懸賞分：1
- 離問題結束還有
大功率雙機拖動型礦井提升機變頻調速技術研究
問題補充： |
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2013-05-23 12:21:38
Drag-type high-power dual-frequency control mine hoist technology research
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2013-05-23 12:23:18
High-powered double-machine type drag mine hoist machine frequency control technology research
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2013-05-23 12:24:58
High efficiency dragging mine pit elevator frequency conversion velocity modulation engineering research
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2013-05-23 12:26:38
High power double-dragging research of frequency conversion speed control technology of mine hoist
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2013-05-23 12:28:18
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