| 摘要 |
PCT No. PCT/BE95/00077 Sec. 371 Date Feb. 24, 1997 Sec. 102(e) Date Feb. 24, 1997 PCT Filed Aug. 23, 1995 PCT Pub. No. WO96/06050 PCT Pub. Date Feb. 29, 1996A water treatment apparatus comprising a power source driving a shaft supporting a helicoidal, spiral-shaped screw having an upper end part and a lower end part and fitted round at least part of the shaft, such that water is sucked up or impelled downwards, the screw comprising at least one continuous screw blade, and at least one discontinuous screw blade near at least one of its end parts. |
