| 摘要 |
A fine crushing device for mineral or vegetable particles comprising a closed chamber, the bottom of which, of frustoconical shape, is provided with an exhaust opening and inside which is arranged a sifting screen defining with the chamber cover a flat cylindrical volume inside which rotates at high speed at least one rotary knife, whereby the product to be crushed, introduced through a feed opening provided in the cover, is reduced in particles of required fineness through successive impacts against the knife or knives until they pass through the screen.
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