| 摘要 |
The friction drive includes drive bush (3) fixed on shaft (1), supporting ring (4) rotatively mounted on the drive bush. A drive bush having ring-wall (5) and the supporting ring including a winding tube or winding core are made of steel with weak magnetism, the ring- face of ring-wall (5) opposite to ring-face (6) of supporting ring (4), ring-face (6) of ring-wall (5) include copper ring (7).
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