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| 青铜焊 (以青铜为焊接剂) | |||
| 青铜焊料硬钎焊 | |||
| 青铜焊; 青铜丝电弧焊 | |||
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| 青铜焊; 青铜丝电弧焊 | |||
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bronze welding : 3 phrases in 1 subject |
| Metallurgy | 3 |
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