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| diamond pyramid hardness; diamond hardness | |||
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| diamond pyramid hardness number; diamond pyramid number | |||
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金刚锥硬度 : 17 phrases in 8 subjects |
| Automobiles | 2 |
| Aviation | 1 |
| Earth sciences | 2 |
| Geophysics | 1 |
| Metallurgy | 4 |
| Oil / petroleum | 1 |
| Plastics | 1 |
| Technology | 5 |
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