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关注：1
2013-05-23 12:21
求翻译：煤矿采深持续增加是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
煤矿采深持续增加
问题补充： |
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2013-05-23 12:21:38
Coal mining continued to increase deep
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2013-05-23 12:23:18
Coal mining was continued to increase
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2013-05-23 12:24:58
The coal mine picks deeply increases continually
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2013-05-23 12:26:38
Coal mining continued to increase
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2013-05-23 12:28:18
units deep coal mines continued to increase;
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