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| 51. | open proving equipment |
| 开式标定设备 |
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| 52. | setting-out of center line of workings |
| 巷道中线标定 |
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| 53. | standardization of lubricants |
| 润滑剂的标定 |
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| 54. | range calibrator |
| 距离标定器 |
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| 55. | setting-out of side plumb-bob |
| 边垂线标定 |
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| 56. | weight calibration device |
| 重量标定装置 |
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| 57. | setting-out of technical edge |
| 技术境界标定 |
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| 58. | specified rim diameter |
| 标定轮辋直径 |
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| 59. | log calibration |
| 测井曲线标定 |
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| 60. | harbor reference point |
| 港口标定台 |
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