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| 51. | maintenance error |
| 维修错误 |
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| 52. | gang maintenance |
| 道班养路 |
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| 53. | site maintenance |
| 外勤维修 |
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| 54. | maintenance expense |
| 维护费用;维修费用 |
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| 55. | maintenance area |
| 维修区;养护面积 |
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| 56. | maintenance dictionary |
| 维护用代码词典 |
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| 57. | maintenance card |
| 维护卡片 |
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| 58. | maintenance establishment |
| 保养编制;保养机构 |
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| 59. | maintenance costs |
| 维护费用 |
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| 60. | maintenance force |
| 维修养护工队 |
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