基本解釋[經(jīng)濟(jì)學(xué)]窄選脈沖放大器詞組短語短語narrow -gate ǖ amplifier 窄選脈沖放大器narrow-gate amplifier更多詞組專業(yè)釋義經(jīng)濟(jì)學(xué)窄選脈沖放大器