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| 空气排除 | |||
| 通风; 排气; 换气; 抽气; 除气 | |||
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| 除〔换，抽，排〕气的 | |||
| air removal: 7 phrases in 3 subjects |
| Electronics | 1 |
| Nautical | 1 |
| Technology | 5 |
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