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| hollow forging; pierced billet; hollow shell; shell (Some plants now follow a practice where the shell is changed out on a regular basis every few weeks during an eight hour downshift. 现在有些钢厂采用的做法是每隔几周定期停产 8h 更换炉壳。); tube shell | |||
| 荒管: 19 phrases in 2 subjects |
| Desert science | 1 |
| Metallurgy | 18 |