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| 21. | alloy ductile iron roll |
| 合金球铁轧辊 |
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| 22. | ductile fracture toughness |
| 延性断裂韧度 |
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| 23. | ductile iron fitting |
| 球墨铸铁装置；延性铁装置 |
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| 24. | centrifugal ductile iron pipe |
| 高压韧性离心球墨铸铁管 |
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| 25. | ductile iron pipe |
| 墨铁管 |
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| 26. | Ductile iron pipe fittings |
| GB/T13294-1991球墨铸铁管件 |
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| 27. | ductile deformation episode |
| 塑性形变幕 |
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| 28. | ductile permanent-magnetic material |
| 可变形永磁材料 |
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| 29. | ductile hard magnetic alloys |
| 可变形硬磁合金 |
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| 30. | ductile-brittle transition temperature |
| 韧性－脆性转变温度 |
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