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21. | wavenumber filter |
| 波数滤波器 |
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22. | Gaussian filter |
| 高斯滤波器 |
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23. | receiving filter |
| 接收滤波器 |
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24. | inductance filter |
| 电感滤波器 |
|
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25. | averaging filter |
| 平均滤波器 |
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26. | filter transformator |
| 滤波器变压器 |
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27. | confluent filter |
| 合流滤波器 |
|
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28. | accessory filter |
| 辅助滤波器 |
|
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29. | filter characteristic |
| 滤波器特性 |
|
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30. | monolithic filter |
| 单片滤波器 |
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