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| 齿轮研磨机 | |||
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| 磨研齿机 | |||
| 齿轮研磨精研， 抛光机 | |||
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gear- lapping machine : 5 phrases in 4 subjects |
| Automobiles | 2 |
| Mechanic engineering | 1 |
| Shipbuilding | 1 |
| Technology | 1 |
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