我们应用电子技术中“参差调谐放大器”的原理，研制了一种结构新型的参差宽带换能器。
A kind of transducer with novel construction, the stagger-tuned wide-band transducer has been developed based on the principle of the "stagger-tuned Amplifier".
但是NEC已经开发出了一种新的谐波调谐放大器，可以从其它方面使这些标准设备的效能增强45%。
However, NEC has developed a new harmonically tuned amplifier which achieves 45% efficiency on otherwise standard components.
但是NEC已经开发出了一种新的谐波调谐放大器，可以从其它方面使这些标准设备的效能增强45%。
However, NEC has developed a new harmonically tuned amplifier which achieves 45% efficiency on otherwise standard components.
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