| 摘要 |
An impeller for installation within a pulp screening machine in which each blade of the impeller is provided with a white water dilution channel communicating with the hollow shaft for the purpose of projecting streams of white water against the inner face of the screen. These dilution channels are located in the same axial position on each set of radially opposite blades and on adjacent blades the dilution channels are offset longitudinally by one width of channel so that each longitudinal strip of the screen plate is cleaned by two dilution channels.
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