| 摘要 |
A friction gear has drive and driven rollers installed on drive and driven shafts, respectively, at that drive roller is placed inside driven roller. The drive roller has hub, rim and pellets, hub and rim are connected to each other, and pellets are placed inside rim, at that hub is rigidly fixed on drive shaft, and rim is made of springy material, mostly of oil-stable rubber, as shell in trough-like profile.
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