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| 71. | multiplicative intermediate frequency demodulation |
| 乘积式中频解调 |
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| 72. | intermediate-frequency amplifier valve |
| 中频放大电子管 |
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| 73. | line transformator |
| 线路变压器|传输线变压器 |
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| 74. | hot elbowing by inductive heating |
| 中频加热弯管 |
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| 75. | amplifier transformator |
| 放大器变压器|低频变压器 |
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| 76. | medium and very high frequency direction-finding statio |
| 中频甚高频测向台 |
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| 77. | series transformator |
| 串联变压器|电流变压器 |
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| 78. | IF sweep signal generator |
| 中频扫频仪 |
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| 79. | VHF television IF strip |
| 甚高频电视中频部分 |
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| 80. | picture IF stage |
| 图像中频放大级 |
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