| 摘要 |
A hammer device 10 is provided, fixed to the outside 2" of the said wall 2 along which the material slides, so as to produce mechanical shocks that are transmitted to the said wall 2, each shock being accompanied by the rapid discharge of a mass of compressed air; to the device 10 is connected at least one diffuser device 40 to introduce the said air mass into the mass of material that is sliding along the inside 2' of the said wall 2. <IMAGE> |
