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关注：1
2013-05-23 12:21
求翻译：钢管对口之前应在沟槽内先挖好焊口工作坑。是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
钢管对口之前应在沟槽内先挖好焊口工作坑。
问题补充： |
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2013-05-23 12:21:38
Steel counterparts should be in the groove before the first pit dug weld work.
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2013-05-23 12:23:18
steel tube counterparts should be before the first digging trenches in good welding work Hang.
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2013-05-23 12:24:58
Steel pipe suitable before should dig the crater labor pit first in the trench.
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2013-05-23 12:26:38
Steel counterpart to dig in the Groove welded joints before working pit.
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2013-05-23 12:28:18
Steel counterparts should be in the groove before the first pit dug weld work.
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