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| 11. | datum dimension |
| 基准标注 |
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| 12. | canonical base point |
| 典范基点 |
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| 13. | original bench mark |
| 水准基点 |
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| 14. | datum identifier |
| 基准标识 |
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| 15. | accidental base point |
| 偶然基点 |
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| 16. | assigned base point |
| 指定基点 |
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| 17. | fixed base point |
| 固定基点 |
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| 18. | datum axis |
| 基准轴 |
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| 19. | first order net |
| 基点网 |
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| 20. | datum plan |
| 基准面 |
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