| 摘要 |
<p>A water storage reservoir, prevailingly underground, comprising a first reservoir provided above the ground level and connected to water feeding and distribution means, an underground tank which is also connected to said water feeding means, a second reservoir provided inside said tank and on its bottom, and connected to said tank through opening means, the pressure of the water columns in series in the first reservoir and in the tank being always lower than the water feeding pressure.</p> |
