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11. | Recursive filter |
| 递归滤波器 |
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12. | acoustic filter |
| 声滤波器 |
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13. | filter impedance |
| 滤波器阻抗 |
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14. | homomorphic filter |
| 同态滤波器 |
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15. | demodulator filter |
| 解调滤波器 |
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16. | multiplex filter |
| 多路复用滤波器 |
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17. | orthogonal filter |
| 正交滤波器 |
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18. | integrating filter |
| 积分滤波器 |
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19. | quadrature filter |
| 求积滤波器 |
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20. | heterodyne filter |
| 外差滤波器 |
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