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关注：1
2013-05-23 12:21
求翻译：下向胶结充填复采河砂充填采矿工作是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
下向胶结充填复采河砂充填采矿工作
问题补充： |
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2013-05-23 12:21:38
To cement filling repeated mining of river sand filling mining work
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2013-05-23 12:23:18
Filled with bonding by gluing to the back row river filled with sand mining
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2013-05-23 12:24:58
Next to cemented buries sufficiently picks the river sand backfill mining work
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2013-05-23 12:26:38
To the cement filling mining under River sand filling
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2013-05-23 12:28:18
filled bonding by gluing to the back row River mining work filled with sand;
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