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| 锅炉水管 | |||
| boiler water tube: 22 phrases in 8 subjects |
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| Electric machinery | 1 |
| Electronics | 3 |
| Metallurgy | 1 |
| Nautical | 2 |
| Oil / petroleum | 1 |
| Shipbuilding | 3 |
| Technology | 10 |
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