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| autogenous cutting; autogenous welding | |||
| 乙 炔气焊: 24 phrases in 8 subjects |
| Drilling | 2 |
| Ecology | 1 |
| General | 1 |
| Metallurgy | 5 |
| Oil / petroleum | 2 |
| Refrigeration | 1 |
| Shipbuilding | 1 |
| Technology | 11 |
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