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| 表面硬化; 敷焊硬合金表面 | |||
| 硬面堆焊 | |||
| 敷焊硬合表面 | |||
| 硬表堆焊 | |||
| 硬质面层; 硬质路面; 硬质合金覆面; 硬质焊敷层 | |||
| 表面淬火 | |||
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| 表面淬火硬化; 渗碳; 硬质合金覆面面层，焊敷层 | |||
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hard surfacing : 4 phrases in 3 subjects |
| Metallurgy | 2 |
| Steel production | 1 |
| Technology | 1 |
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