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| 水准; 水平; 水平面; 水平线; 水准器; 水平仪; 等级 | |||
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レベル : 126 phrases in 10 subjects |
| Automatic control | 3 |
| Computer networks | 1 |
| Ecology | 1 |
| Electricity generation | 2 |
| Electronics | 4 |
| Microsoft | 3 |
| Nuclear physics | 5 |
| Piezoelectric crystals | 6 |
| Technology | 99 |
| Video recording | 2 |
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