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| 双管焊接 | |||
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| 双面焊缝 | |||
| 双盖缝 | |||
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double welding : 66 phrases in 9 subjects |
| Bridge construction | 2 |
| Electric machinery | 1 |
| Hydroelectric power stations | 1 |
| Industry | 1 |
| Metallurgy | 33 |
| Oil / petroleum | 5 |
| Plastics | 9 |
| Rail transport | 2 |
| Technology | 12 |
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