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21. | maintenance safeguard |
| 维护保障措施 |
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22. | maintenance organization |
| 维修组织 |
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23. | maintenance period |
| 保养周期 |
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24. | Maintenance stage |
| 维持阶段 |
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25. | maintenance rate |
| 修理率 |
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26. | maintenance routine |
| 维修程序 |
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27. | maintenance rehabilitation |
| 疗养服务 |
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28. | Maintenance services |
| 维修事务 |
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29. | maintenance road |
| 维修用道路 |
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30. | maintenance statement |
| 维修声明书 |
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