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| 71. | calibration mark |
| 校正标志 |
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| 72. | marking of lifesaving appliance |
| 救生设备标志 |
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| 73. | product marking |
| 产品标志 |
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| 74. | sign transporter |
| 标志运输车 |
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| 75. | national boundary marker |
| 国界标志 |
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| 76. | adjustment mark |
| 照准标志 |
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| 77. | prospecting guide |
| 勘探标志 |
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| 78. | gamma-ray signature |
| 伽马射线标志 |
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| 79. | notch generator |
| 标志发生器 |
|
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| 80. | signs of failure |
| 断裂标志 |
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