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| 真密度 | |||
| 实际疏密度 | |||
| 实际密度; 真实密度 | |||
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actual density : 12 phrases in 6 subjects |
| Drilling | 1 |
| Electric machinery | 2 |
| Electronics | 2 |
| Metallurgy | 2 |
| Technology | 4 |
| Textile industry | 1 |
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