| 摘要 |
1. The well filter is constituted by one or several separable segments, joined into a filtering column. Each segment contains long slat-shaped elements equipped with filtering slits and fastened together with clamping rings. The elements have bevels to allow them to be connected into a skeleton. It is characterised in that each filter segment (1) contains at least (4 + 2n, where n = 0, 1, 2, 3, ...) long slat-shaped elements (2), fastened together with known clamping rings (5). The slat-shaped elements (2) are shifted with respect to each other to form toothed front edges (6), used to join segments (1) together. |
