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| 活性〔腐蚀性〕气体 | |||
| 活性气体; 腐蚀性气体 | |||
| 活动气体 | |||
| active gas: 11 phrases in 5 subjects |
| Automobiles | 2 |
| Chemistry | 1 |
| Electronics | 2 |
| Oil processing plants | 1 |
| Technology | 5 |
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