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| 单折叠; 重皮; 浇注重皮 | |||
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single lap : 38 phrases in 10 subjects |
| Architecture | 2 |
| Automobiles | 1 |
| Aviation | 1 |
| Bridge construction | 1 |
| Chemistry | 1 |
| Drilling | 1 |
| Electric machinery | 5 |
| Oil / petroleum | 5 |
| Plastics | 4 |
| Technology | 17 |
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