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| flow line; weld mark | |||
| 熔缝: 44 phrases in 10 subjects |
| Chemistry | 1 |
| Desert science | 1 |
| Electronics | 1 |
| Hydroelectric power stations | 2 |
| Metallurgy | 11 |
| Oil / petroleum | 1 |
| Plastics | 1 |
| Shipbuilding | 1 |
| Technology | 17 |
| Textile industry | 8 |
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