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| 21. | auxiliary materia |
| 辅助材料;辅助原料;副原料 |
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| 22. | auxiliary rear spring |
| 副后弹簧 |
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| 23. | auxiliary governor spring |
| 副调节弹簧 |
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| 24. | auxiliary blade of switch |
| 开关副闸刀 |
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| 25. | auxiliary standard pipe |
| 副标准管 |
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| 26. | auxiliary valve spring |
| 副阀弹簧 |
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| 27. | auxiliary bucket ladder |
| 副斗桥 |
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| 28. | lower auxiliary steam port |
| 下部副气口 |
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| 29. | auxiliary hook load |
| 副钩起重量 |
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| 30. | auxiliary hoisting mechanism |
| 副起升机构 |
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