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| 强度等级 | |||
| 强度水平; 强度级 | |||
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strength level : 12 phrases in 6 subjects |
| Metallurgy | 6 |
| Oil / petroleum | 1 |
| Sports | 1 |
| Technology | 2 |
| Telecommunications | 1 |
| Water resources | 1 |
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