| 摘要 |
A hollow, polymeric sludge collector flight is provided having a sigma-shaped cross-section, including a wedge-shaped transverse indentation on its forward face, a vertically extending wear lip on its scraping edge, and a transverse gap on its rear face. The gap allows free circulation of liquid within the non-buoyant flight. The indentation structurally stiffens the mid-span section of the flight. Where additional stiffness is required, filler blocks may be placed between mounting blocks.
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