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| 软熔光亮处理; 软熔发亮处理 (薄钢板电镀锡层的) | |||
| 软熔发亮处理; 软钎焊涂层 | |||
| flow brightening: 4 phrases in 2 subjects |
| Metallurgy | 3 |
| Technology | 1 |
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