| 摘要 |
<p>In a well with filter tube (11) and filter gravel fill (12) a slot profile for a collection element (13) forming the suction tube which has larger suction cut-outs (14) at the bottom than at the top and which effects an equalization of the flow velocity of the water passing into the filter gravel layer (12) is established on the basis of the combination of calculations and empirical investigations.</p> |
