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关注：1
2013-05-23 12:21
求翻译：·正确观测方法之四：电焊护目镜观测是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
·正确观测方法之四：电焊护目镜观测
问题补充： |
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2013-05-23 12:21:38
The correct methods of observation: welding goggles observation
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2013-05-23 12:23:18
One of the methods, proper observation 4: electric welding goggles observation
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2013-05-23 12:24:58
· fourth correct observation method: Electric welding goggles observation
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2013-05-23 12:26:38
· Four correct observation method: observation of welding goggles
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2013-05-23 12:28:18
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