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| 均衡试验 | |||
| 平衡试验 | |||
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balancing test : 10 phrases in 7 subjects |
| Aviation | 1 |
| Electric machinery | 1 |
| Electronics | 1 |
| Hydroelectric power stations | 1 |
| Nautical | 1 |
| Space | 4 |
| Wind Energy | 1 |
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