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81. | bandwidth-duration product |
| 带宽-时间乘积 |
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82. | field rate duration |
| 场周期 |
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83. | long duration event |
| 持续时间长的项目 |
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84. | strength duration curve |
| 强度时间曲线 |
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85. | pulse duration coder |
| 脉冲宽度编码器 |
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86. | short duration repair |
| 短期修理 |
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87. | pulse duration control |
| 脉冲持续时间控制 |
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88. | duration of wearing |
| 持久耐用 |
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89. | pulse duration modulation |
| 脉冲持续时间调制 |
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90. | flow duration curve |
| 量历时曲线 |
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