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| 压力气焊; 气压焊 | |||
| 加压气焊 | |||
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| 气体压力焊〔接法〕 | |||
| 气压焊; 加压气焊 | |||
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| 气体压焊 | |||
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pressure gas welding : 16 phrases in 5 subjects |
| Electronics | 1 |
| Metallurgy | 3 |
| Nautical | 1 |
| Oil / petroleum | 2 |
| Technology | 9 |
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