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| 焊剂层下自动弧焊 | |||
| 自动埋弧焊 | |||
| 埋弧自动焊 (焊剂层下自动弧焊) | |||
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| 埋弧自动焊 | |||
| 自动埋弧焊 | |||
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automatic submerged arc welding : 9 phrases in 3 subjects |
| Metallurgy | 2 |
| Shipbuilding | 2 |
| Technology | 5 |
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