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关注：1
2013-05-23 12:21
求翻译：Although, most of the slab track was initially used for tunnels and bridges, slab track was also tried on soil roadbed during the mid-1970s.是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
Although, most of the slab track was initially used for tunnels and bridges, slab track was also tried on soil roadbed during the mid-1970s.
问题补充： |
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