在岩溶地区隧道施工过程中，涌水、涌泥(砂)已经成为隧道施工的第一大害。
During the construction of tunnels in karst mountain, water inrush and gushing mud (sand) disaster has ranked the first in all the disasters.
在岩溶地区隧道施工过程中，涌水、涌泥(砂)已经成为隧道施工的第一大害。
During the construction of tunnels in karst mountain, water inrush and gushing mud (sand) disaster has ranked the first in all the disasters.
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