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| 51. | butterfly valve |
| 蝶阀 |
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| 52. | swallowtail butterfly |
| 凤蝶 |
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| 53. | sulphur butterfly |
| 白蝴蝶 |
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| 54. | a butterfly valve |
| 【机】蝶形阀 |
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| 55. | butterfly capacitor |
| 蝶形电容器 |
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| 56. | Butterfly Valley |
| 蝴蝶谷 |
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| 57. | butterfly cooky |
| 蝴蝶饼 |
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| 58. | Opposite nip type line with rubber butterfly valve, metal hard seal eccentric butterfly valve, intensifying |
| 对夹式衬胶蝶阀，金属硬密封偏心蝶阀，强化聚氟乙烯软密封蝶阀，低负载轻型高温蝶阀，衬氟蝶阀。 |
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| 59. | butterfly throttle |
| 蝶形风门 |
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| 60. | silken butterfly wings; |
| 绸子似的蝴蝶翅膀； |
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