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关注：1
2013-05-23 12:21
求翻译：井道上方的开口必须采用圈框，此圈框应当凸 出地面至少50mm。是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
井道上方的开口必须采用圈框，此圈框应当凸 出地面至少50mm。
问题补充： |
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2013-05-23 12:21:38
The opening of the shaft above the ring box, this ring box should protrude the ground at least 50mm.
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2013-05-23 12:23:18
Well, the opening must be on a ring box, this ring box and the floor should be at least 50 mm .
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2013-05-23 12:24:58
The well place above aperture must use the circle frame, this frame must be raised Leaves ground at least 50mm.
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2013-05-23 12:26:38
Well above the opening must be in the box, this box should be raised at least 50mm.
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2013-05-23 12:28:18
正在翻译，请等待...
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