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| 洛氏硬度计 | |||
| 洛尔硬度计 | |||
| 洛氏硬度试验仪; 洛氏硬度试验器; 洛氏硬度试验机 | |||
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Rockwell hardness tester : 9 phrases in 5 subjects |
| Agriculture | 1 |
| Construction | 1 |
| Metallurgy | 2 |
| Oil / petroleum | 3 |
| Technology | 2 |
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