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| 真空; 真空作业混凝土 | |||
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真空 : 66 phrases in 7 subjects |
| Electric machinery | 1 |
| Isolation | 1 |
| Physics | 1 |
| Piezoelectric crystals | 1 |
| Superconductivity | 2 |
| Technology | 52 |
| Thermal Energy | 8 |
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