落羽神恋曲 发表于 2021-2-19 18:44

资阳幸福大道明挖段大门对面的地上多了一个沉降观测标志！有什么用呢？

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笑天 发表于 2021-2-19 18:51

不清楚

九五至尊 发表于 2021-2-19 19:08

不知道

森林里的木子萍 发表于 2021-2-19 19:47

{:hemadagubp:}{:hemadagubp:}

封狼居胥 发表于 2021-2-19 20:12

这个不晓得

无所畏惧 发表于 2021-2-19 20:52

下一位请讲

天堂天堂 发表于 2021-2-19 21:10

不知道

凌枫 发表于 2021-2-20 07:07

下一位，请解释一下

冲冲 发表于 2021-2-20 07:36

不清楚

铁匠五金标件 发表于 2021-2-20 08:12

观测沉降，以此为参照点
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