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| 火室〔箱〕; 机车锅炉炉膛 | |||
| 火箱; 燃烧室 | |||
| firebox: 19 phrases in 5 subjects |
| Mechanics | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 3 |
| Rail transport | 3 |
| Technology | 11 |
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