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| 滚动轴承螺旋滚子; 弹簧滚柱 | |||
| 挠性滚子; 轴承的弹簧滚柱 | |||
| flexible roller: 8 phrases in 3 subjects |
| Automobiles | 2 |
| Metallurgy | 1 |
| Technology | 5 |
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