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| 通风排气管道; 燃油箱通气管 | |||
| 通风管 | |||
| 通风管 (道); 通风立管; 风筒; 换气管 | |||
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ventilation pipe : 19 phrases in 3 subjects |
| Electric machinery | 2 |
| Rail transport | 2 |
| Technology | 15 |
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