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| 通风〔排气，出烟〕孔 | |||
| 通气口; 出烟口 | |||
| 气眼 | |||
| 通风气口孔; 主缸补偿孔; 通风气孔 | |||
| 排气口 | |||
| 排液孔 | |||
| 通气孔道 | |||
| 通风孔; 通气孔 | |||
| 牙掌通气孔 | |||
| 通风孔排气孔 | |||
| 放气孔 | |||
| 排气孔 | |||
| 指孔; 透气孔 | |||
| |||
| 通气孔通风孔 | |||
| 通风口 | |||
| 通气孔 | |||
| |||
| 排气孔 | |||
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vent hole : 3 phrases in 3 subjects |
| Automobiles | 1 |
| Metallurgy | 1 |
| Wind Energy | 1 |
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