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| 21. | thin-film band pass filter |
| 薄膜带通滤光片 |
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| 22. | ultraviolet band pass filter |
| 紫外带通滤光片 |
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| 23. | Microwave Band-pass filter |
| 微波带通滤波器 |
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| 24. | low-pass filter type impedance transformer |
| 低通滤波型阻抗变换器 |
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| 25. | symmetrical band-pass filter |
| 对称通带滤波器 |
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| 26. | high and low pass filter |
| 高、低通滤波器 |
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| 27. | 16-channel low-pass filter |
| 16通道低通滤波器 |
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| 28. | sound surface wave band pass filter |
| 声表面波带通滤波器 |
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| 29. | receiving branch band-pass filter |
| 接收支路带通滤波器 |
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| 30. | linear cut-off low-pass filter |
| 线性截止低通滤波器 |
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