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| 两面焊缝 | |||
| 双面焊缝 | |||
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| 两面焊缝; 双面焊接接头 | |||
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double welded joint : 10 phrases in 4 subjects |
| Oil / petroleum | 1 |
| Plastics | 1 |
| Shipbuilding | 1 |
| Technology | 7 |
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