The first stage project of line 1 of Chengdu Metro mostly passes through water-rich sandy cobble ground, which contains a small amount of large boulders.
成都地铁一号线一期工程区间隧道大多通过富水砂卵石地层，且含有少量大粒径漂石。
The first stage project of line 1 of Chengdu Metro mostly passes through water-rich sandy cobble ground, which contains a small amount of large boulders.
成都地铁一号线一期工程区间隧道大多通过富水砂卵石地层，且含有少量大粒径漂石。
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