| 摘要 |
<p>The filter has a set of honey comb monolithic blocks (4) including a central portion (7), where calorific capacity of the central portion is greater than that of peripheral portion (8) of same volume of the monolithic blocks. Ratio between proportion of an opening surface on a leading edge of the central portion and a specific filtration surface of the central portion and proportion of an opening surface on a leading edge of the peripheral portion and a specific filtration surface of the peripheral portion ranges from 0.95 to 1.05 or is even equal to 1. An independent claim is also included for an extrusion die shaped to form a monolithic block provided with channels for manufacturing a filter.</p> |
