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| 高速切削钢 | |||
| 易切钢; 易切〔快削〕钢; 易切削钢 | |||
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| 易切削钢 | |||
| 高速切削钢 | |||
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free machining steel : 7 phrases in 1 subject |
| Metallurgy | 7 |
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