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81. | differential resistivity |
| 电阻率差 |
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82. | calculus of finite differences |
| 差分法 |
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83. | focus difference |
| 焦距差 |
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84. | Pressure difference |
| 压力差 |
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85. | difference frequency |
| 差频 |
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86. | differential pen |
| 差动笔 |
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87. | difference in optical path |
| 程差 |
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88. | differential stress |
| 应力差 |
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89. | difference triangle |
| 差三角 |
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90. | Difference signal |
| 差信号 |
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