groundwater drainage works

常见例句

雙語例句

• 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.
  文章認爲，設置排水設施和地層防滲加固是減小襯砌外水壓力及維持地下水系平衡的有傚措施。
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