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| 测程弹簧; 范围弹簧 | |||
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range spring : 21 phrases in 7 subjects |
| Animal husbandry | 1 |
| Automobiles | 1 |
| Desert science | 2 |
| Hydroelectric power stations | 1 |
| Nautical | 1 |
| Port facilities | 1 |
| Technology | 14 |
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