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| 平行平面 | |||
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| 平面平行的 | |||
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| 平行平面 | |||
| 平行面 | |||
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parallel planes : 24 phrases in 12 subjects |
| Automobiles | 1 |
| Bridge construction | 1 |
| Chemistry | 1 |
| Electronics | 1 |
| Engineering geology | 1 |
| General | 1 |
| Marketing | 1 |
| Metallurgy | 2 |
| Physics | 1 |
| Plastics | 1 |
| Technology | 12 |
| Telecommunications | 1 |
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