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| |||
| 焊接道次; 焊接次数 | |||
| 焊道; 溶敷焊道 | |||
| 焊接通道 | |||
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weld pass : 11 phrases in 3 subjects |
| Metallurgy | 4 |
| Oil / petroleum | 3 |
| Technology | 4 |
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