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关注：1
2013-05-23 12:21
求翻译：置牵引机于井道顶层承重梁上是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
置牵引机于井道顶层承重梁上
问题补充： |
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2013-05-23 12:21:38
Set tractor beam on the shaft top bearing
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2013-05-23 12:23:18
traction machine built-in top-level load-bearing Leung on Wells road
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2013-05-23 12:24:58
Sets at tractor Yu Jing on top layer load-bearing Liang
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2013-05-23 12:26:38
Put tractor at shafts to front load-bearing beam
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2013-05-23 12:28:18
Put the drawing machine on a top floor bearing roof beam of well
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