An effective pre-drainage system in a limited area that has a high water head and huge inflow is important to prevent flooding accidents during subsea tunnelling.
一个有效的预排水系统在一个有限的区域内，有一个高水头，巨大的流入，重要的是要防止水浸事故发生的海底隧道。
An effective pre-drainage system in a limited area that has a high water head and huge inflow is important to prevent flooding accidents during subsea tunnelling.
一个有效的预排水系统在一个有限的区域内，有一个高水头，巨大的流入，重要的是要防止水浸事故发生的海底隧道。
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