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| harder than half hard | |||
| high hardness | |||
| glass hard | |||
| 高硬度: 53 phrases in 14 subjects |
| Business | 1 |
| Drilling | 1 |
| General | 2 |
| Golf | 1 |
| Jewelry | 1 |
| Metallurgy | 27 |
| Oil / petroleum | 1 |
| Polymers | 2 |
| Project management | 1 |
| Space | 1 |
| Steel production | 1 |
| Technology | 12 |
| Water resources | 1 |
| Wood processing | 1 |
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