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| available carbon | |||
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平 衡 碳 : 34 phrases in 9 subjects |
| Agriculture | 5 |
| Animal husbandry | 1 |
| Construction | 1 |
| Desert science | 1 |
| Engineering geology | 1 |
| Environment | 1 |
| Metallurgy | 15 |
| Oil / petroleum | 1 |
| Technology | 8 |
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