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| 双层壁的 | |||
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| 双壁的 | |||
| 双墙的; 双层的 | |||
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double walled : 31 phrases in 10 subjects |
| Agriculture | 4 |
| Automobiles | 2 |
| Chemistry | 1 |
| Electronics | 1 |
| Metallurgy | 3 |
| Oil / petroleum | 3 |
| Plastics | 7 |
| Shipbuilding | 1 |
| Technology | 8 |
| Water resources | 1 |
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