当挖方位于天然地下水面以下时或有地下水流经时，排水就成为一个主要的工序。
Dewatering becomes a major operation when the excavation lies below the natural water table and intercepts the groundwater flow.
本文阐明了地下水流经含锌岩石是锌矿泉水形成的前提。
The premise of the forming of Zn mineral water is the groundwater flowing through Zn-bearing rocks.
本文阐明了地下水流经含锌岩石是锌矿泉水形成的前提。
The premise of the forming of Zn mineral water is the groundwater flowing through Zn-bearing rocks.
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