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| pilot joint | |||
| test welding | |||
| test weld | |||
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试焊 : 111 phrases in 12 subjects |
| Automobiles | 2 |
| Aviation | 3 |
| Chemistry | 1 |
| Electronics | 5 |
| General | 1 |
| Hydroelectric power stations | 1 |
| Metallurgy | 28 |
| Nautical | 8 |
| Oil / petroleum | 7 |
| Plastics | 1 |
| Space | 3 |
| Technology | 51 |
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