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关注：1
2013-05-23 12:21
求翻译： 只有合格的专业人员才可以安装、调试及保养节能变频器。是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
只有合格的专业人员才可以安装、调试及保养节能变频器。
问题补充： |
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2013-05-23 12:21:38
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2013-05-23 12:23:18
* Only qualified professionals can installation, commissioning and maintenance saving transducer.
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2013-05-23 12:24:58
Only then the qualified specialist only then may install, the debugging and the maintenance energy conservation frequency changer.
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2013-05-23 12:26:38
Only qualified professionals can install, commissioning and maintenance of energy-saving frequency converter.
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2013-05-23 12:28:18
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