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关注：1
2013-05-23 12:21
求翻译：因为是密封装置和无泵结构，是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
因为是密封装置和无泵结构，
问题补充： |
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2013-05-23 12:21:38
Because no pumps are sealed units and structures,
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2013-05-23 12:23:18
Because it is a sealing device structure and there is no pump.
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2013-05-23 12:24:58
Because is the packing assembly and the non-pump structure,
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2013-05-23 12:26:38
Because sealing device and pump-free,
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2013-05-23 12:28:18
Sealing device and pump-free because it is a structure,
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