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| 41. | Zero intermediate frequency signal |
| 零中频信号 |
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| 42. | intermediate frequency rejection |
| 中频抑制 |
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| 43. | intermediate frequency stage |
| 中频级 |
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| 44. | propagation of medium frequency radio wave |
| 中频电波传播 |
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| 45. | IF feed-through |
| 中频直通 |
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| 46. | Intermediate frequency integration |
| 中频积累 |
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| 47. | IFP (Intermediate-Frequency Preamplifier) |
| 中频前置放大器 |
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| 48. | Intermediate frequency canceller |
| 中频对消器 |
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| 49. | Intermediate frequency signal |
| 中频信号 |
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| 50. | mid-frequency induction hardening |
| 中频感应淬火 |
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