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| 周转齿轮系 | |||
| 行星齿轮系传动，机构 | |||
| 行星齿轮 | |||
| 周转轮系 | |||
| 行星齿轮系; 外摆线轮系 | |||
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| 行星齿轮系; 周转轮系; 外摆线轮系 | |||
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epicyclic train : 8 phrases in 3 subjects |
| Automobiles | 1 |
| Mechanics | 1 |
| Technology | 6 |
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