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71. | double voltage connection |
| 倍压联结 |
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72. | octave band oscillator |
| 倍带振荡器 |
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73. | sodium sesquisilicate |
| 倍半硅酸钠 |
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74. | low-power microscope |
| 低倍显微镜 |
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75. | law of multiple proportions |
| 倍比定律 |
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76. | double density encoding |
| 倍密度编码 |
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77. | double angle fomula |
| 倍角公式 |
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78. | macroscopic examination |
| 低倍检验 |
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79. | double density diskette |
| 倍密度软磁盘 |
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80. | low-power objective |
| 低倍物镜 |
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