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| X 形坡口 | |||
| 双面V形坡口 (X形) | |||
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| X 型槽 | |||
| 双 V 形坡口 | |||
| 双面V形坡口 | |||
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| 焊接的 X形槽口; 双 V形槽口 | |||
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double- V groove : 7 phrases in 4 subjects |
| Electric machinery | 1 |
| Electronics | 3 |
| Metallurgy | 2 |
| Technology | 1 |
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