| 摘要 |
PCT No. PCT/SE88/00076 Sec. 371 Date Jun. 27, 1989 Sec. 102(e) Date Jun. 27, 1989 PCT Filed Feb. 23, 1988 PCT Pub. No. WO88/06490 PCT Pub. Date Sep. 7, 1988.A refiner segment (1) for disc refiners is formed with a pattern of bars (2,4) and grooves (3,5), and flow restrictions (6) are located in the grooves (5). Through apertures (8) in the bars (4), the grooves (5) communicate with each other so that the grooves have free communication outward and inward via the apertures (8). |
