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关注：1
2013-05-23 12:21
求翻译：操作起重机的场地地面必须坚实、平整，倾斜度不大于1：20，工作过程地面不得下陷。是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
操作起重机的场地地面必须坚实、平整，倾斜度不大于1：20，工作过程地面不得下陷。
问题补充： |
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2013-05-23 12:21:38
Site ground of operating cranes must be a solid, smooth, the gradient of not greater than 1:20, the course of their work the ground shall not sag.
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2013-05-23 12:23:18
Operation of a crane the surface must be a solid, flat, and tilt is not at 1:20, the process may not be ground subsidence.
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2013-05-23 12:24:58
正在翻译，请等待...
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2013-05-23 12:26:38
Surface operating cranes must be solid, flat, the slant is not greater than 1:20, work ground may not subside.
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2013-05-23 12:28:18
Operates the hoist crane the location ground to have to be solid, to be smooth, the gradient is not bigger than 1:20, the work process ground does not have to undercut.
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