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| 硬质材料 | |||
| 坚硬物料 | |||
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hard materials : 39 phrases in 11 subjects |
| Automobiles | 1 |
| Aviation | 1 |
| Chemistry | 2 |
| Construction | 1 |
| Electronics | 4 |
| General | 1 |
| Metallurgy | 7 |
| Polymers | 4 |
| Technology | 15 |
| Telecommunications | 1 |
| Textile industry | 2 |
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