- 级: level; rank; grade
- 增益: gain; tone-up; transmission ...
- 单级增益: one pass gain
- 放大级增益: stage gain
- 增益: [电学] gain; tone-up; transmission gain 高增益 high gain; 分贝增益 decibel gain; 增益饱和 gain saturation; 增益放大器 gain amplifier; 增益控制 gain control; 增益匹配 gain matching; 增益衰减 gain reduction; 增益调节 gain control; 增益余量[裕度] [控] gain margin
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