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| 刚度标度; 硬度标度; 硬度级 | |||
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| 硬度标度 | |||
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hardness degree : 13 phrases in 8 subjects |
| Architecture | 1 |
| Chemistry | 3 |
| Metallurgy | 1 |
| Plastics | 1 |
| Space | 1 |
| Technology | 4 |
| Textile industry | 1 |
| Wind Energy | 1 |
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