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| 蝶形阀板; 节流阀; 节气门 | |||
| 摩托车的节气门; 阻塞阀 | |||
| 蝴蝶闸门; 蝶形闸门; 蝶阀 | |||
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butterfly gate : 1 phrase in 1 subject |
| Technology | 1 |
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