短語(yǔ)詞組短語(yǔ)enhancement of primary sedimentation 強(qiáng)化一級(jí)処理enhanced primary sedimentation 強(qiáng)化一級(jí)処理primary sedimentation pond 初次沉澱池primary sedimentation pool 初沉池circular primary sedimentation tank 輻流式初沉池primary sedimentation tank 初次沉澱池;初沉池primary sedimentation basin 一次沉澱池sludge from primary sedimentation tank 初沉汙泥 返回 primary sedimentation