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| 焊接周期; 焊接时间 | |||
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| 焊接周期; 焊接时间 | |||
| 接触焊通电时间; 焊接通电时间 | |||
| welding time: 12 phrases in 4 subjects |
| Construction | 1 |
| Metallurgy | 6 |
| Rail transport | 2 |
| Technology | 3 |
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