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| Rockwell hardness figure | |||
| Rockwell figure | |||
| Rockwell hardness number; Rockwell number; Rockwell hardness; conical indentation hardness | |||
| число твёрдости по Роквеллу: 9 phrases in 5 subjects |
| Construction | 1 |
| Materials science | 1 |
| Metallurgy | 2 |
| Mining | 4 |
| Quality control and standards | 1 |