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| 煤气平衡 | |||
| 气体天平 | |||
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gas balance : 14 phrases in 7 subjects |
| Agriculture | 2 |
| Automobiles | 1 |
| Construction | 1 |
| Earth sciences | 1 |
| Metallurgy | 4 |
| Oil / petroleum | 2 |
| Technology | 3 |
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