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| 41. | calibration mark |
| 校正标志 |
|
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| 42. | marking of lifesaving appliance |
| 救生设备标志 |
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| 43. | product marking |
| 产品标志 |
|
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| | |
| 44. | sign transporter |
| 标志运输车 |
|
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| 45. | national boundary marker |
| 国界标志 |
|
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| | |
| 46. | adjustment mark |
| 照准标志 |
|
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| | |
| 47. | prospecting guide |
| 勘探标志 |
|
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| | |
| 48. | gamma-ray signature |
| 伽马射线标志 |
|
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| | |
| 49. | notch generator |
| 标志发生器 |
|
|
| | |
| 50. | signs of failure |
| 断裂标志 |
|
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| | |