每楼住户每年减少自来水费开支，又节约了饮用水，利 国利民。

Each floor of the annual water charges can be reduced and save the water.

youdao

每楼住户每年减少自来水费开支，又节约了饮用水，利 国利民。

Each floor of the annual water charges can be reduced and save the water.

youdao