常見例句雙語例句The main constructions of our water supply and purification system: sand basin, reaction and sedimentation tank, double-valves filtering pond etc.我廠給水処理系統(tǒng)的主要搆築物：沉砂池、反應(yīng)池沉澱池、雙閥濾池等。 返回 sedimentation pond