| 摘要 |
An industrial plant such as a disc dryer is constructed or retro-fitted with discs each comprising two annular plates connected to one another around their outer edges, each plate comprising one or more integral ribs extending between its inner edge and outer edge. The integral ribs may comprise folds in the annular plates, and each plate may be formed from a length of sheet material, by roll forming for example, so that the integral ribs are deeper towards the inner peripheral edge than the outer peripheral edge of the annular plates forming the disc. |
