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| 21. | extrudable insulatio |
| 压挤绝缘注射式绝缘;注射式绝缘 |
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| 22. | clay brick insulatio |
| 耐火砖绝缘|粘土砖绝缘 |
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| 23. | track insulation |
| 轨道绝缘|钢轨绝缘 |
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| 24. | flyback transformator |
| 回授变压器|回描变压器 |
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| 25. | fluid insulation |
| 流体绝缘|液体绝缘 |
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| 26. | insulation washer |
| 绝缘垫圈|绝缘垫 |
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| 27. | destruction of insulation |
| 绝缘损坏;绝缘损坏 |
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| 28. | house transformator |
| 厂用变压器|自用变压器 |
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| 29. | insulating blanket |
| 绝缘镀层|绝缘涂层 |
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| 30. | transformer for electric furnace |
| 电炉变压器;电炉用变压器 |
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