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| 烧煤气的加热器 | |||
| 燃气加热炉 | |||
| 燃气加热器 | |||
| gas -fired heater: 12 phrases in 5 subjects |
| Ecology | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Refrigeration | 2 |
| Technology | 7 |
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