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Rockwell hardness D | |||
Rockwell hardness, D | |||
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Rockwell hardness C |
твёрдость по Роквеллу, шкала : 25 phrases in 10 subjects |
Drilling | 2 |
General | 2 |
Metallurgy | 7 |
Military | 1 |
Polymers | 1 |
Quality control and standards | 4 |
Sakhalin | 1 |
Seismology | 2 |
Technology | 4 |
Transport | 1 |