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| 氧气焊 | |||
| 氧气焊接 | |||
| 氧气焊接; 氧焊接; 气焊 | |||
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| 氧气焊接; 氧焊接 | |||
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oxygen welding : 10 phrases in 6 subjects |
| Construction | 1 |
| Drilling | 1 |
| Hydroelectric power stations | 3 |
| Nautical | 1 |
| Oil / petroleum | 1 |
| Technology | 3 |
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