Indeed, background leakage is so pervasive that water suppliers accept 3, 500 litres of water per kilometre of pipe per day as the minimum achievable loss.

事实上，底面渗漏现象随处可见，供水商也接受了每日每千米管道3500升的最低漏水量。

youdao

Indeed, background leakage is so pervasive that water suppliers accept 3,500 litres of water per kilometre of pipe per day as the minimum achievable loss.

事实上，底面渗漏现象随处可见，供水商也接受了每日每千米管道3500升的最低漏水量。

youdao