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| 51. | body wave magnitude |
| 体波震级 |
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| 52. | photometric absolute magnitude |
| 绝对测光星等;绝对测光星等 |
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| 53. | magnitude of deflection |
| 偏倾度 |
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| 54. | sign magnitude arithmetic |
| 符号数值运算 |
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| 55. | magnitude of eclipse |
| 食分 |
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| 56. | magnitude-frequency relatio |
| 震级－频度关系 |
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| 57. | magnitude of explosion |
| 爆炸等级 |
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| 58. | absolute red magnitude |
| 绝对红星等;绝对红星等 |
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| 59. | magnitude of interference |
| 过盈量 |
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| 60. | limiting apparent magnitude |
| 极限视星等 |
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