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| |||
| box hardening; pack-hardening; pack-carburizing | |||
| pack carburizing | |||
| |||
| pack hardening | |||
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| pack-carburizing | |||
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装箱 渗碳 : 7 phrases in 4 subjects |
| General | 1 |
| Metallurgy | 2 |
| Oil / petroleum | 2 |
| Technology | 2 |
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