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| 活塞销敲击响 | |||
| pin knock: 32 phrases in 8 subjects |
| Automobiles | 5 |
| Chemistry | 1 |
| Continuous casting | 6 |
| General | 4 |
| Plastics | 4 |
| Refractory materials | 4 |
| Roll stock | 4 |
| Technology | 4 |
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