Water supply and drainage works as a residential district of the city an important part of its design and construction quality have a direct impact on the use of functional area.
给排水工程作为城市住宅小区的重要组成部分，其设计施工质量的好坏直接影响小区的使用功能。
The paper considers that the drainage works and the impervious element are the effective measures for reducing external water pressure on the lining and maintaining groundwater balance.
文章认为，设置排水设施和地层防渗加固是减小衬砌外水压力及维持地下水系平衡的有效措施。
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